21087710

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4243}}^1$

素因数の和:4328

約数の個数: 32

約数和(自身を含む): 44001792

約数和(自身を除く): 22914082

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 71, 142, 355, 497, 710, 994, 2485, 4243, 4970, 8486, 21215, 29701, 42430, 59402, 148505, 297010, 301253, 602506, 1506265, 2108771, 3012530, 4217542, 10543855, 21087710]

約数ペア:

[(1, 21087710), (2, 10543855), (5, 4217542), (7, 3012530), (10, 2108771), (14, 1506265), (35, 602506), (70, 301253), (71, 297010), (142, 148505), (355, 59402), (497, 42430), (710, 29701), (994, 21215), (2485, 8486), (4243, 4970)]