21177875

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{241}}^1$

素因数の和:312

約数の個数: 32

約数和(自身を含む): 28691520

約数和(自身を除く): 7513645

約数列:

[1, 5, 19, 25, 37, 95, 125, 185, 241, 475, 703, 925, 1205, 2375, 3515, 4579, 4625, 6025, 8917, 17575, 22895, 30125, 44585, 87875, 114475, 169423, 222925, 572375, 847115, 1114625, 4235575, 21177875]

約数ペア:

[(1, 21177875), (5, 4235575), (19, 1114625), (25, 847115), (37, 572375), (95, 222925), (125, 169423), (185, 114475), (241, 87875), (475, 44585), (703, 30125), (925, 22895), (1205, 17575), (2375, 8917), (3515, 6025), (4579, 4625)]