20198175

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{6263}}^1$

素因数の和:6319

約数の個数: 24

約数和(自身を含む): 34176384

約数和(自身を除く): 13978209

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 645, 1075, 3225, 6263, 18789, 31315, 93945, 156575, 269309, 469725, 807927, 1346545, 4039635, 6732725, 20198175]

約数ペア:

[(1, 20198175), (3, 6732725), (5, 4039635), (15, 1346545), (25, 807927), (43, 469725), (75, 269309), (129, 156575), (215, 93945), (645, 31315), (1075, 18789), (3225, 6263)]