81025420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{2851}}^1$

素因数の和:2903

約数の個数: 72

約数和(自身を含む): 204830640

約数和(自身を除く): 123805220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 116, 140, 145, 196, 203, 245, 290, 406, 490, 580, 812, 980, 1015, 1421, 2030, 2842, 2851, 4060, 5684, 5702, 7105, 11404, 14210, 14255, 19957, 28420, 28510, 39914, 57020, 79828, 82679, 99785, 139699, 165358, 199570, 279398, 330716, 399140, 413395, 558796, 578753, 698495, 826790, 1157506, 1396990, 1653580, 2315012, 2793980, 2893765, 4051271, 5787530, 8102542, 11575060, 16205084, 20256355, 40512710, 81025420]

約数ペア:

[(1, 81025420), (2, 40512710), (4, 20256355), (5, 16205084), (7, 11575060), (10, 8102542), (14, 5787530), (20, 4051271), (28, 2893765), (29, 2793980), (35, 2315012), (49, 1653580), (58, 1396990), (70, 1157506), (98, 826790), (116, 698495), (140, 578753), (145, 558796), (196, 413395), (203, 399140), (245, 330716), (290, 279398), (406, 199570), (490, 165358), (580, 139699), (812, 99785), (980, 82679), (1015, 79828), (1421, 57020), (2030, 39914), (2842, 28510), (2851, 28420), (4060, 19957), (5684, 14255), (5702, 14210), (7105, 11404)]