21989985

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{331}}^1$

素因数の和:485

約数の個数: 32

約数和(自身を含む): 36461568

約数和(自身を除く): 14471583

約数列:

[1, 3, 5, 15, 43, 103, 129, 215, 309, 331, 515, 645, 993, 1545, 1655, 4429, 4965, 13287, 14233, 22145, 34093, 42699, 66435, 71165, 102279, 170465, 213495, 511395, 1465999, 4397997, 7329995, 21989985]

約数ペア:

[(1, 21989985), (3, 7329995), (5, 4397997), (15, 1465999), (43, 511395), (103, 213495), (129, 170465), (215, 102279), (309, 71165), (331, 66435), (515, 42699), (645, 34093), (993, 22145), (1545, 14233), (1655, 13287), (4429, 4965)]