19780320

素因数分解:

$2^5\times 3^1\times 5^1\times 7^2\times {\mathrm{29}}^2$

素因数の和:90

約数の個数: 216

約数和(自身を含む): 75066264

約数和(自身を除く): 55285944

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 29, 30, 32, 35, 40, 42, 48, 49, 56, 58, 60, 70, 80, 84, 87, 96, 98, 105, 112, 116, 120, 140, 145, 147, 160, 168, 174, 196, 203, 210, 224, 232, 240, 245, 280, 290, 294, 336, 348, 392, 406, 420, 435, 464, 480, 490, 560, 580, 588, 609, 672, 696, 735, 784, 812, 840, 841, 870, 928, 980, 1015, 1120, 1160, 1176, 1218, 1392, 1421, 1470, 1568, 1624, 1680, 1682, 1740, 1960, 2030, 2320, 2352, 2436, 2523, 2784, 2842, 2940, 3045, 3248, 3360, 3364, 3480, 3920, 4060, 4205, 4263, 4640, 4704, 4872, 5046, 5684, 5880, 5887, 6090, 6496, 6728, 6960, 7105, 7840, 8120, 8410, 8526, 9744, 10092, 11368, 11760, 11774, 12180, 12615, 13456, 13920, 14210, 16240, 16820, 17052, 17661, 19488, 20184, 21315, 22736, 23520, 23548, 24360, 25230, 26912, 28420, 29435, 32480, 33640, 34104, 35322, 40368, 41209, 42630, 45472, 47096, 48720, 50460, 56840, 58870, 67280, 68208, 70644, 80736, 82418, 85260, 88305, 94192, 97440, 100920, 113680, 117740, 123627, 134560, 136416, 141288, 164836, 170520, 176610, 188384, 201840, 206045, 227360, 235480, 247254, 282576, 329672, 341040, 353220, 403680, 412090, 470960, 494508, 565152, 618135, 659344, 682080, 706440, 824180, 941920, 989016, 1236270, 1318688, 1412880, 1648360, 1978032, 2472540, 2825760, 3296720, 3956064, 4945080, 6593440, 9890160, 19780320]

約数ペア:

[(1, 19780320), (2, 9890160), (3, 6593440), (4, 4945080), (5, 3956064), (6, 3296720), (7, 2825760), (8, 2472540), (10, 1978032), (12, 1648360), (14, 1412880), (15, 1318688), (16, 1236270), (20, 989016), (21, 941920), (24, 824180), (28, 706440), (29, 682080), (30, 659344), (32, 618135), (35, 565152), (40, 494508), (42, 470960), (48, 412090), (49, 403680), (56, 353220), (58, 341040), (60, 329672), (70, 282576), (80, 247254), (84, 235480), (87, 227360), (96, 206045), (98, 201840), (105, 188384), (112, 176610), (116, 170520), (120, 164836), (140, 141288), (145, 136416), (147, 134560), (160, 123627), (168, 117740), (174, 113680), (196, 100920), (203, 97440), (210, 94192), (224, 88305), (232, 85260), (240, 82418), (245, 80736), (280, 70644), (290, 68208), (294, 67280), (336, 58870), (348, 56840), (392, 50460), (406, 48720), (420, 47096), (435, 45472), (464, 42630), (480, 41209), (490, 40368), (560, 35322), (580, 34104), (588, 33640), (609, 32480), (672, 29435), (696, 28420), (735, 26912), (784, 25230), (812, 24360), (840, 23548), (841, 23520), (870, 22736), (928, 21315), (980, 20184), (1015, 19488), (1120, 17661), (1160, 17052), (1176, 16820), (1218, 16240), (1392, 14210), (1421, 13920), (1470, 13456), (1568, 12615), (1624, 12180), (1680, 11774), (1682, 11760), (1740, 11368), (1960, 10092), (2030, 9744), (2320, 8526), (2352, 8410), (2436, 8120), (2523, 7840), (2784, 7105), (2842, 6960), (2940, 6728), (3045, 6496), (3248, 6090), (3360, 5887), (3364, 5880), (3480, 5684), (3920, 5046), (4060, 4872), (4205, 4704), (4263, 4640)]