21234395

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{113}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 32749920

約数和(自身を除く): 11515525

約数列:

[1, 5, 7, 13, 35, 49, 59, 65, 91, 113, 245, 295, 413, 455, 565, 637, 767, 791, 1469, 2065, 2891, 3185, 3835, 3955, 5369, 5537, 6667, 7345, 10283, 14455, 26845, 27685, 33335, 37583, 46669, 51415, 71981, 86671, 187915, 233345, 326683, 359905, 433355, 606697, 1633415, 3033485, 4246879, 21234395]

約数ペア:

[(1, 21234395), (5, 4246879), (7, 3033485), (13, 1633415), (35, 606697), (49, 433355), (59, 359905), (65, 326683), (91, 233345), (113, 187915), (245, 86671), (295, 71981), (413, 51415), (455, 46669), (565, 37583), (637, 33335), (767, 27685), (791, 26845), (1469, 14455), (2065, 10283), (2891, 7345), (3185, 6667), (3835, 5537), (3955, 5369)]