21113625

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:163

約数の個数: 64

約数和(自身を含む): 38997504

約数和(自身を除く): 17883879

約数列:

[1, 3, 5, 13, 15, 25, 39, 61, 65, 71, 75, 125, 183, 195, 213, 305, 325, 355, 375, 793, 915, 923, 975, 1065, 1525, 1625, 1775, 2379, 2769, 3965, 4331, 4575, 4615, 4875, 5325, 7625, 8875, 11895, 12993, 13845, 19825, 21655, 22875, 23075, 26625, 56303, 59475, 64965, 69225, 99125, 108275, 115375, 168909, 281515, 297375, 324825, 346125, 541375, 844545, 1407575, 1624125, 4222725, 7037875, 21113625]

約数ペア:

[(1, 21113625), (3, 7037875), (5, 4222725), (13, 1624125), (15, 1407575), (25, 844545), (39, 541375), (61, 346125), (65, 324825), (71, 297375), (75, 281515), (125, 168909), (183, 115375), (195, 108275), (213, 99125), (305, 69225), (325, 64965), (355, 59475), (375, 56303), (793, 26625), (915, 23075), (923, 22875), (975, 21655), (1065, 19825), (1525, 13845), (1625, 12993), (1775, 11895), (2379, 8875), (2769, 7625), (3965, 5325), (4331, 4875), (4575, 4615)]