21328125

素因数分解:

$3^1\times 5^7\times 7^1\times {\mathrm{13}}^1$

素因数の和:58

約数の個数: 64

約数和(自身を含む): 43749888

約数和(自身を除く): 22421763

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 65, 75, 91, 105, 125, 175, 195, 273, 325, 375, 455, 525, 625, 875, 975, 1365, 1625, 1875, 2275, 2625, 3125, 4375, 4875, 6825, 8125, 9375, 11375, 13125, 15625, 21875, 24375, 34125, 40625, 46875, 56875, 65625, 78125, 109375, 121875, 170625, 203125, 234375, 284375, 328125, 546875, 609375, 853125, 1015625, 1421875, 1640625, 3046875, 4265625, 7109375, 21328125]

約数ペア:

[(1, 21328125), (3, 7109375), (5, 4265625), (7, 3046875), (13, 1640625), (15, 1421875), (21, 1015625), (25, 853125), (35, 609375), (39, 546875), (65, 328125), (75, 284375), (91, 234375), (105, 203125), (125, 170625), (175, 121875), (195, 109375), (273, 78125), (325, 65625), (375, 56875), (455, 46875), (525, 40625), (625, 34125), (875, 24375), (975, 21875), (1365, 15625), (1625, 13125), (1875, 11375), (2275, 9375), (2625, 8125), (3125, 6825), (4375, 4875)]