21096985

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{233}}^1$

素因数の和:457

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10352615

約数列:

[1, 5, 7, 13, 35, 65, 91, 199, 233, 455, 995, 1165, 1393, 1631, 2587, 3029, 6965, 8155, 12935, 15145, 18109, 21203, 46367, 90545, 106015, 231835, 324569, 602771, 1622845, 3013855, 4219397, 21096985]

約数ペア:

[(1, 21096985), (5, 4219397), (7, 3013855), (13, 1622845), (35, 602771), (65, 324569), (91, 231835), (199, 106015), (233, 90545), (455, 46367), (995, 21203), (1165, 18109), (1393, 15145), (1631, 12935), (2587, 8155), (3029, 6965)]