20571540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{439}}^1$

素因数の和:533

約数の個数: 96

約数和(自身を含む): 63866880

約数和(自身を除く): 43295340

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 71, 110, 132, 142, 165, 213, 220, 284, 330, 355, 426, 439, 660, 710, 781, 852, 878, 1065, 1317, 1420, 1562, 1756, 2130, 2195, 2343, 2634, 3124, 3905, 4260, 4390, 4686, 4829, 5268, 6585, 7810, 8780, 9372, 9658, 11715, 13170, 14487, 15620, 19316, 23430, 24145, 26340, 28974, 31169, 46860, 48290, 57948, 62338, 72435, 93507, 96580, 124676, 144870, 155845, 187014, 289740, 311690, 342859, 374028, 467535, 623380, 685718, 935070, 1028577, 1371436, 1714295, 1870140, 2057154, 3428590, 4114308, 5142885, 6857180, 10285770, 20571540]

約数ペア:

[(1, 20571540), (2, 10285770), (3, 6857180), (4, 5142885), (5, 4114308), (6, 3428590), (10, 2057154), (11, 1870140), (12, 1714295), (15, 1371436), (20, 1028577), (22, 935070), (30, 685718), (33, 623380), (44, 467535), (55, 374028), (60, 342859), (66, 311690), (71, 289740), (110, 187014), (132, 155845), (142, 144870), (165, 124676), (213, 96580), (220, 93507), (284, 72435), (330, 62338), (355, 57948), (426, 48290), (439, 46860), (660, 31169), (710, 28974), (781, 26340), (852, 24145), (878, 23430), (1065, 19316), (1317, 15620), (1420, 14487), (1562, 13170), (1756, 11715), (2130, 9658), (2195, 9372), (2343, 8780), (2634, 7810), (3124, 6585), (3905, 5268), (4260, 4829), (4390, 4686)]