81340980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{379}}^1$

素因数の和:478

約数の個数: 144

約数和(自身を含む): 269277120

約数和(自身を除く): 187936140

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 73, 84, 98, 105, 140, 146, 147, 196, 210, 219, 245, 292, 294, 365, 379, 420, 438, 490, 511, 588, 730, 735, 758, 876, 980, 1022, 1095, 1137, 1460, 1470, 1516, 1533, 1895, 2044, 2190, 2274, 2555, 2653, 2940, 3066, 3577, 3790, 4380, 4548, 5110, 5306, 5685, 6132, 7154, 7580, 7665, 7959, 10220, 10612, 10731, 11370, 13265, 14308, 15330, 15918, 17885, 18571, 21462, 22740, 26530, 27667, 30660, 31836, 35770, 37142, 39795, 42924, 53060, 53655, 55334, 55713, 71540, 74284, 79590, 83001, 92855, 107310, 110668, 111426, 138335, 159180, 166002, 185710, 193669, 214620, 222852, 276670, 278565, 332004, 371420, 387338, 415005, 553340, 557130, 581007, 774676, 830010, 968345, 1114260, 1162014, 1355683, 1660020, 1936690, 2324028, 2711366, 2905035, 3873380, 4067049, 5422732, 5810070, 6778415, 8134098, 11620140, 13556830, 16268196, 20335245, 27113660, 40670490, 81340980]

約数ペア:

[(1, 81340980), (2, 40670490), (3, 27113660), (4, 20335245), (5, 16268196), (6, 13556830), (7, 11620140), (10, 8134098), (12, 6778415), (14, 5810070), (15, 5422732), (20, 4067049), (21, 3873380), (28, 2905035), (30, 2711366), (35, 2324028), (42, 1936690), (49, 1660020), (60, 1355683), (70, 1162014), (73, 1114260), (84, 968345), (98, 830010), (105, 774676), (140, 581007), (146, 557130), (147, 553340), (196, 415005), (210, 387338), (219, 371420), (245, 332004), (292, 278565), (294, 276670), (365, 222852), (379, 214620), (420, 193669), (438, 185710), (490, 166002), (511, 159180), (588, 138335), (730, 111426), (735, 110668), (758, 107310), (876, 92855), (980, 83001), (1022, 79590), (1095, 74284), (1137, 71540), (1460, 55713), (1470, 55334), (1516, 53655), (1533, 53060), (1895, 42924), (2044, 39795), (2190, 37142), (2274, 35770), (2555, 31836), (2653, 30660), (2940, 27667), (3066, 26530), (3577, 22740), (3790, 21462), (4380, 18571), (4548, 17885), (5110, 15918), (5306, 15330), (5685, 14308), (6132, 13265), (7154, 11370), (7580, 10731), (7665, 10612), (7959, 10220)]