21051760

素因数分解:

$2^4\times 5^1\times {\mathrm{359}}^1\times {\mathrm{733}}^1$

素因数の和:1105

約数の個数: 40

約数和(自身を含む): 49148640

約数和(自身を除く): 28096880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 359, 718, 733, 1436, 1466, 1795, 2872, 2932, 3590, 3665, 5744, 5864, 7180, 7330, 11728, 14360, 14660, 28720, 29320, 58640, 263147, 526294, 1052588, 1315735, 2105176, 2631470, 4210352, 5262940, 10525880, 21051760]

約数ペア:

[(1, 21051760), (2, 10525880), (4, 5262940), (5, 4210352), (8, 2631470), (10, 2105176), (16, 1315735), (20, 1052588), (40, 526294), (80, 263147), (359, 58640), (718, 29320), (733, 28720), (1436, 14660), (1466, 14360), (1795, 11728), (2872, 7330), (2932, 7180), (3590, 5864), (3665, 5744)]