21721875

素因数分解:

$3^1\times 5^5\times 7^1\times {\mathrm{331}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 41497344

約数和(自身を除く): 19775469

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 125, 175, 331, 375, 525, 625, 875, 993, 1655, 1875, 2317, 2625, 3125, 4375, 4965, 6951, 8275, 9375, 11585, 13125, 21875, 24825, 34755, 41375, 57925, 65625, 124125, 173775, 206875, 289625, 620625, 868875, 1034375, 1448125, 3103125, 4344375, 7240625, 21721875]

約数ペア:

[(1, 21721875), (3, 7240625), (5, 4344375), (7, 3103125), (15, 1448125), (21, 1034375), (25, 868875), (35, 620625), (75, 289625), (105, 206875), (125, 173775), (175, 124125), (331, 65625), (375, 57925), (525, 41375), (625, 34755), (875, 24825), (993, 21875), (1655, 13125), (1875, 11585), (2317, 9375), (2625, 8275), (3125, 6951), (4375, 4965)]