21298125

素因数分解:

$3^1\times 5^4\times {\mathrm{37}}^1\times {\mathrm{307}}^1$

素因数の和:367

約数の個数: 40

約数和(自身を含む): 36563296

約数和(自身を除く): 15265171

約数列:

[1, 3, 5, 15, 25, 37, 75, 111, 125, 185, 307, 375, 555, 625, 921, 925, 1535, 1875, 2775, 4605, 4625, 7675, 11359, 13875, 23025, 23125, 34077, 38375, 56795, 69375, 115125, 170385, 191875, 283975, 575625, 851925, 1419875, 4259625, 7099375, 21298125]

約数ペア:

[(1, 21298125), (3, 7099375), (5, 4259625), (15, 1419875), (25, 851925), (37, 575625), (75, 283975), (111, 191875), (125, 170385), (185, 115125), (307, 69375), (375, 56795), (555, 38375), (625, 34077), (921, 23125), (925, 23025), (1535, 13875), (1875, 11359), (2775, 7675), (4605, 4625)]