19600020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{521}}^1$

素因数の和:566

約数の個数: 144

約数和(自身を含む): 68402880

約数和(自身を除く): 48802860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 19, 20, 22, 30, 33, 36, 38, 44, 45, 55, 57, 60, 66, 76, 90, 95, 99, 110, 114, 132, 165, 171, 180, 190, 198, 209, 220, 228, 285, 330, 342, 380, 396, 418, 495, 521, 570, 627, 660, 684, 836, 855, 990, 1042, 1045, 1140, 1254, 1563, 1710, 1881, 1980, 2084, 2090, 2508, 2605, 3126, 3135, 3420, 3762, 4180, 4689, 5210, 5731, 6252, 6270, 7524, 7815, 9378, 9405, 9899, 10420, 11462, 12540, 15630, 17193, 18756, 18810, 19798, 22924, 23445, 28655, 29697, 31260, 34386, 37620, 39596, 46890, 49495, 51579, 57310, 59394, 68772, 85965, 89091, 93780, 98990, 103158, 108889, 114620, 118788, 148485, 171930, 178182, 197980, 206316, 217778, 257895, 296970, 326667, 343860, 356364, 435556, 445455, 515790, 544445, 593940, 653334, 890910, 980001, 1031580, 1088890, 1306668, 1633335, 1781820, 1960002, 2177780, 3266670, 3920004, 4900005, 6533340, 9800010, 19600020]

約数ペア:

[(1, 19600020), (2, 9800010), (3, 6533340), (4, 4900005), (5, 3920004), (6, 3266670), (9, 2177780), (10, 1960002), (11, 1781820), (12, 1633335), (15, 1306668), (18, 1088890), (19, 1031580), (20, 980001), (22, 890910), (30, 653334), (33, 593940), (36, 544445), (38, 515790), (44, 445455), (45, 435556), (55, 356364), (57, 343860), (60, 326667), (66, 296970), (76, 257895), (90, 217778), (95, 206316), (99, 197980), (110, 178182), (114, 171930), (132, 148485), (165, 118788), (171, 114620), (180, 108889), (190, 103158), (198, 98990), (209, 93780), (220, 89091), (228, 85965), (285, 68772), (330, 59394), (342, 57310), (380, 51579), (396, 49495), (418, 46890), (495, 39596), (521, 37620), (570, 34386), (627, 31260), (660, 29697), (684, 28655), (836, 23445), (855, 22924), (990, 19798), (1042, 18810), (1045, 18756), (1140, 17193), (1254, 15630), (1563, 12540), (1710, 11462), (1881, 10420), (1980, 9899), (2084, 9405), (2090, 9378), (2508, 7815), (2605, 7524), (3126, 6270), (3135, 6252), (3420, 5731), (3762, 5210), (4180, 4689)]