21531160

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{587}}^1$

素因数の和:736

約数の個数: 64

約数和(自身を含む): 55883520

約数和(自身を除く): 34352360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 131, 140, 262, 280, 524, 587, 655, 917, 1048, 1174, 1310, 1834, 2348, 2620, 2935, 3668, 4109, 4585, 4696, 5240, 5870, 7336, 8218, 9170, 11740, 16436, 18340, 20545, 23480, 32872, 36680, 41090, 76897, 82180, 153794, 164360, 307588, 384485, 538279, 615176, 768970, 1076558, 1537940, 2153116, 2691395, 3075880, 4306232, 5382790, 10765580, 21531160]

約数ペア:

[(1, 21531160), (2, 10765580), (4, 5382790), (5, 4306232), (7, 3075880), (8, 2691395), (10, 2153116), (14, 1537940), (20, 1076558), (28, 768970), (35, 615176), (40, 538279), (56, 384485), (70, 307588), (131, 164360), (140, 153794), (262, 82180), (280, 76897), (524, 41090), (587, 36680), (655, 32872), (917, 23480), (1048, 20545), (1174, 18340), (1310, 16436), (1834, 11740), (2348, 9170), (2620, 8218), (2935, 7336), (3668, 5870), (4109, 5240), (4585, 4696)]