21248435

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{233}}^1$

素因数の和:335

約数の個数: 32

約数和(自身を含む): 29248128

約数和(自身を除く): 7999693

約数列:

[1, 5, 13, 23, 61, 65, 115, 233, 299, 305, 793, 1165, 1403, 1495, 3029, 3965, 5359, 7015, 14213, 15145, 18239, 26795, 69667, 71065, 91195, 184769, 326899, 348335, 923845, 1634495, 4249687, 21248435]

約数ペア:

[(1, 21248435), (5, 4249687), (13, 1634495), (23, 923845), (61, 348335), (65, 326899), (115, 184769), (233, 91195), (299, 71065), (305, 69667), (793, 26795), (1165, 18239), (1403, 15145), (1495, 14213), (3029, 7015), (3965, 5359)]