21510125

素因数分解:

$5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:127

約数の個数: 64

約数和(自身を含む): 34664448

約数和(自身を除く): 13154323

約数列:

[1, 5, 7, 13, 25, 31, 35, 61, 65, 91, 125, 155, 175, 217, 305, 325, 403, 427, 455, 775, 793, 875, 1085, 1525, 1625, 1891, 2015, 2135, 2275, 2821, 3875, 3965, 5425, 5551, 7625, 9455, 10075, 10675, 11375, 13237, 14105, 19825, 24583, 27125, 27755, 47275, 50375, 53375, 66185, 70525, 99125, 122915, 138775, 172081, 236375, 330925, 352625, 614575, 693875, 860405, 1654625, 3072875, 4302025, 21510125]

約数ペア:

[(1, 21510125), (5, 4302025), (7, 3072875), (13, 1654625), (25, 860405), (31, 693875), (35, 614575), (61, 352625), (65, 330925), (91, 236375), (125, 172081), (155, 138775), (175, 122915), (217, 99125), (305, 70525), (325, 66185), (403, 53375), (427, 50375), (455, 47275), (775, 27755), (793, 27125), (875, 24583), (1085, 19825), (1525, 14105), (1625, 13237), (1891, 11375), (2015, 10675), (2135, 10075), (2275, 9455), (2821, 7625), (3875, 5551), (3965, 5425)]