21494625

素因数分解:

$3^1\times 5^3\times {\mathrm{31}}^1\times {\mathrm{43}}^2$

素因数の和:135

約数の個数: 48

約数和(自身を含む): 37799424

約数和(自身を除く): 16304799

約数列:

[1, 3, 5, 15, 25, 31, 43, 75, 93, 125, 129, 155, 215, 375, 465, 645, 775, 1075, 1333, 1849, 2325, 3225, 3875, 3999, 5375, 5547, 6665, 9245, 11625, 16125, 19995, 27735, 33325, 46225, 57319, 99975, 138675, 166625, 171957, 231125, 286595, 499875, 693375, 859785, 1432975, 4298925, 7164875, 21494625]

約数ペア:

[(1, 21494625), (3, 7164875), (5, 4298925), (15, 1432975), (25, 859785), (31, 693375), (43, 499875), (75, 286595), (93, 231125), (125, 171957), (129, 166625), (155, 138675), (215, 99975), (375, 57319), (465, 46225), (645, 33325), (775, 27735), (1075, 19995), (1333, 16125), (1849, 11625), (2325, 9245), (3225, 6665), (3875, 5547), (3999, 5375)]