21415875

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:245

約数の個数: 64

約数和(自身を含む): 40255488

約数和(自身を除く): 18839613

約数列:

[1, 3, 5, 13, 15, 23, 25, 39, 65, 69, 75, 115, 125, 191, 195, 299, 325, 345, 375, 573, 575, 897, 955, 975, 1495, 1625, 1725, 2483, 2865, 2875, 4393, 4485, 4775, 4875, 7449, 7475, 8625, 12415, 13179, 14325, 21965, 22425, 23875, 37245, 37375, 57109, 62075, 65895, 71625, 109825, 112125, 171327, 186225, 285545, 310375, 329475, 549125, 856635, 931125, 1427725, 1647375, 4283175, 7138625, 21415875]

約数ペア:

[(1, 21415875), (3, 7138625), (5, 4283175), (13, 1647375), (15, 1427725), (23, 931125), (25, 856635), (39, 549125), (65, 329475), (69, 310375), (75, 285545), (115, 186225), (125, 171327), (191, 112125), (195, 109825), (299, 71625), (325, 65895), (345, 62075), (375, 57109), (573, 37375), (575, 37245), (897, 23875), (955, 22425), (975, 21965), (1495, 14325), (1625, 13179), (1725, 12415), (2483, 8625), (2865, 7475), (2875, 7449), (4393, 4875), (4485, 4775)]