21004220

素因数分解:

$2^2\times 5^1\times {\mathrm{449}}^1\times {\mathrm{2339}}^1$

素因数の和:2797

約数の個数: 24

約数和(自身を含む): 44226000

約数和(自身を除く): 23221780

約数列:

[1, 2, 4, 5, 10, 20, 449, 898, 1796, 2245, 2339, 4490, 4678, 8980, 9356, 11695, 23390, 46780, 1050211, 2100422, 4200844, 5251055, 10502110, 21004220]

約数ペア:

[(1, 21004220), (2, 10502110), (4, 5251055), (5, 4200844), (10, 2100422), (20, 1050211), (449, 46780), (898, 23390), (1796, 11695), (2245, 9356), (2339, 8980), (4490, 4678)]