21345040

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1063}}^1$

素因数の和:1327

約数の個数: 40

約数和(自身を含む): 49871808

約数和(自身を除く): 28526768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1063, 1255, 2008, 2126, 2510, 4016, 4252, 5020, 5315, 8504, 10040, 10630, 17008, 20080, 21260, 42520, 85040, 266813, 533626, 1067252, 1334065, 2134504, 2668130, 4269008, 5336260, 10672520, 21345040]

約数ペア:

[(1, 21345040), (2, 10672520), (4, 5336260), (5, 4269008), (8, 2668130), (10, 2134504), (16, 1334065), (20, 1067252), (40, 533626), (80, 266813), (251, 85040), (502, 42520), (1004, 21260), (1063, 20080), (1255, 17008), (2008, 10630), (2126, 10040), (2510, 8504), (4016, 5315), (4252, 5020)]