21652865

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 29331456

約数和(自身を除く): 7678591

約数列:

[1, 5, 13, 43, 61, 65, 127, 215, 305, 559, 635, 793, 1651, 2623, 2795, 3965, 5461, 7747, 8255, 13115, 27305, 34099, 38735, 70993, 100711, 170495, 333121, 354965, 503555, 1665605, 4330573, 21652865]

約数ペア:

[(1, 21652865), (5, 4330573), (13, 1665605), (43, 503555), (61, 354965), (65, 333121), (127, 170495), (215, 100711), (305, 70993), (559, 38735), (635, 34099), (793, 27305), (1651, 13115), (2623, 8255), (2795, 7747), (3965, 5461)]