21988125

素因数分解:

$3^3\times 5^4\times {\mathrm{1303}}^1$

素因数の和:1332

約数の個数: 40

約数和(自身を含む): 40736960

約数和(自身を除く): 18748835

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 125, 135, 225, 375, 625, 675, 1125, 1303, 1875, 3375, 3909, 5625, 6515, 11727, 16875, 19545, 32575, 35181, 58635, 97725, 162875, 175905, 293175, 488625, 814375, 879525, 1465875, 2443125, 4397625, 7329375, 21988125]

約数ペア:

[(1, 21988125), (3, 7329375), (5, 4397625), (9, 2443125), (15, 1465875), (25, 879525), (27, 814375), (45, 488625), (75, 293175), (125, 175905), (135, 162875), (225, 97725), (375, 58635), (625, 35181), (675, 32575), (1125, 19545), (1303, 16875), (1875, 11727), (3375, 6515), (3909, 5625)]