21551780

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12983}}^1$

素因数の和:13075

約数の個数: 24

約数和(自身を含む): 45807552

約数和(自身を除く): 24255772

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12983, 25966, 51932, 64915, 129830, 259660, 1077589, 2155178, 4310356, 5387945, 10775890, 21551780]

約数ペア:

[(1, 21551780), (2, 10775890), (4, 5387945), (5, 4310356), (10, 2155178), (20, 1077589), (83, 259660), (166, 129830), (332, 64915), (415, 51932), (830, 25966), (1660, 12983)]