28665420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{521}}^1$

素因数の和:671

約数の個数: 96

約数和(自身を含む): 92606976

約数和(自身を除く): 63941556

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 131, 140, 210, 262, 393, 420, 521, 524, 655, 786, 917, 1042, 1310, 1563, 1572, 1834, 1965, 2084, 2605, 2620, 2751, 3126, 3647, 3668, 3930, 4585, 5210, 5502, 6252, 7294, 7815, 7860, 9170, 10420, 10941, 11004, 13755, 14588, 15630, 18235, 18340, 21882, 27510, 31260, 36470, 43764, 54705, 55020, 68251, 72940, 109410, 136502, 204753, 218820, 273004, 341255, 409506, 477757, 682510, 819012, 955514, 1023765, 1365020, 1433271, 1911028, 2047530, 2388785, 2866542, 4095060, 4777570, 5733084, 7166355, 9555140, 14332710, 28665420]

約数ペア:

[(1, 28665420), (2, 14332710), (3, 9555140), (4, 7166355), (5, 5733084), (6, 4777570), (7, 4095060), (10, 2866542), (12, 2388785), (14, 2047530), (15, 1911028), (20, 1433271), (21, 1365020), (28, 1023765), (30, 955514), (35, 819012), (42, 682510), (60, 477757), (70, 409506), (84, 341255), (105, 273004), (131, 218820), (140, 204753), (210, 136502), (262, 109410), (393, 72940), (420, 68251), (521, 55020), (524, 54705), (655, 43764), (786, 36470), (917, 31260), (1042, 27510), (1310, 21882), (1563, 18340), (1572, 18235), (1834, 15630), (1965, 14588), (2084, 13755), (2605, 11004), (2620, 10941), (2751, 10420), (3126, 9170), (3647, 7860), (3668, 7815), (3930, 7294), (4585, 6252), (5210, 5502)]