21195265

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1259}}^1$

素因数の和:1321

約数の個数: 32

約数和(自身を含む): 32175360

約数和(自身を除く): 10980095

約数列:

[1, 5, 7, 13, 35, 37, 65, 91, 185, 259, 455, 481, 1259, 1295, 2405, 3367, 6295, 8813, 16367, 16835, 44065, 46583, 81835, 114569, 232915, 326081, 572845, 605579, 1630405, 3027895, 4239053, 21195265]

約数ペア:

[(1, 21195265), (5, 4239053), (7, 3027895), (13, 1630405), (35, 605579), (37, 572845), (65, 326081), (91, 232915), (185, 114569), (259, 81835), (455, 46583), (481, 44065), (1259, 16835), (1295, 16367), (2405, 8813), (3367, 6295)]