21074575

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{383}}^1$

素因数の和:495

約数の個数: 24

約数和(自身を含む): 27426816

約数和(自身を除く): 6352241

約数列:

[1, 5, 25, 31, 71, 155, 355, 383, 775, 1775, 1915, 2201, 9575, 11005, 11873, 27193, 55025, 59365, 135965, 296825, 679825, 842983, 4214915, 21074575]

約数ペア:

[(1, 21074575), (5, 4214915), (25, 842983), (31, 679825), (71, 296825), (155, 135965), (355, 59365), (383, 55025), (775, 27193), (1775, 11873), (1915, 11005), (2201, 9575)]