21495485

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:269

約数の個数: 32

約数和(自身を含む): 29462400

約数和(自身を除く): 7966915

約数列:

[1, 5, 11, 43, 55, 61, 149, 215, 305, 473, 671, 745, 1639, 2365, 2623, 3355, 6407, 8195, 9089, 13115, 28853, 32035, 45445, 70477, 99979, 144265, 352385, 390827, 499895, 1954135, 4299097, 21495485]

約数ペア:

[(1, 21495485), (5, 4299097), (11, 1954135), (43, 499895), (55, 390827), (61, 352385), (149, 144265), (215, 99979), (305, 70477), (473, 45445), (671, 32035), (745, 28853), (1639, 13115), (2365, 9089), (2623, 8195), (3355, 6407)]