19711020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{661}}^1$

素因数の和:751

約数の個数: 96

約数和(自身を含む): 64060416

約数和(自身を除く): 44349396

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 71, 84, 105, 140, 142, 210, 213, 284, 355, 420, 426, 497, 661, 710, 852, 994, 1065, 1322, 1420, 1491, 1983, 1988, 2130, 2485, 2644, 2982, 3305, 3966, 4260, 4627, 4970, 5964, 6610, 7455, 7932, 9254, 9915, 9940, 13220, 13881, 14910, 18508, 19830, 23135, 27762, 29820, 39660, 46270, 46931, 55524, 69405, 92540, 93862, 138810, 140793, 187724, 234655, 277620, 281586, 328517, 469310, 563172, 657034, 703965, 938620, 985551, 1314068, 1407930, 1642585, 1971102, 2815860, 3285170, 3942204, 4927755, 6570340, 9855510, 19711020]

約数ペア:

[(1, 19711020), (2, 9855510), (3, 6570340), (4, 4927755), (5, 3942204), (6, 3285170), (7, 2815860), (10, 1971102), (12, 1642585), (14, 1407930), (15, 1314068), (20, 985551), (21, 938620), (28, 703965), (30, 657034), (35, 563172), (42, 469310), (60, 328517), (70, 281586), (71, 277620), (84, 234655), (105, 187724), (140, 140793), (142, 138810), (210, 93862), (213, 92540), (284, 69405), (355, 55524), (420, 46931), (426, 46270), (497, 39660), (661, 29820), (710, 27762), (852, 23135), (994, 19830), (1065, 18508), (1322, 14910), (1420, 13881), (1491, 13220), (1983, 9940), (1988, 9915), (2130, 9254), (2485, 7932), (2644, 7455), (2982, 6610), (3305, 5964), (3966, 4970), (4260, 4627)]