81505060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2357}}^1$

素因数の和:2405

約数の個数: 96

約数和(自身を含む): 221840640

約数和(自身を除く): 140335580

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 19, 20, 26, 28, 35, 38, 52, 65, 70, 76, 91, 95, 130, 133, 140, 182, 190, 247, 260, 266, 364, 380, 455, 494, 532, 665, 910, 988, 1235, 1330, 1729, 1820, 2357, 2470, 2660, 3458, 4714, 4940, 6916, 8645, 9428, 11785, 16499, 17290, 23570, 30641, 32998, 34580, 44783, 47140, 61282, 65996, 82495, 89566, 122564, 153205, 164990, 179132, 214487, 223915, 306410, 313481, 329980, 428974, 447830, 582179, 612820, 626962, 857948, 895660, 1072435, 1164358, 1253924, 1567405, 2144870, 2328716, 2910895, 3134810, 4075253, 4289740, 5821790, 6269620, 8150506, 11643580, 16301012, 20376265, 40752530, 81505060]

約数ペア:

[(1, 81505060), (2, 40752530), (4, 20376265), (5, 16301012), (7, 11643580), (10, 8150506), (13, 6269620), (14, 5821790), (19, 4289740), (20, 4075253), (26, 3134810), (28, 2910895), (35, 2328716), (38, 2144870), (52, 1567405), (65, 1253924), (70, 1164358), (76, 1072435), (91, 895660), (95, 857948), (130, 626962), (133, 612820), (140, 582179), (182, 447830), (190, 428974), (247, 329980), (260, 313481), (266, 306410), (364, 223915), (380, 214487), (455, 179132), (494, 164990), (532, 153205), (665, 122564), (910, 89566), (988, 82495), (1235, 65996), (1330, 61282), (1729, 47140), (1820, 44783), (2357, 34580), (2470, 32998), (2660, 30641), (3458, 23570), (4714, 17290), (4940, 16499), (6916, 11785), (8645, 9428)]