21971960

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{5333}}^1$

素因数の和:5447

約数の個数: 32

約数和(自身を含む): 49926240

約数和(自身を除く): 27954280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 5333, 10666, 21332, 26665, 42664, 53330, 106660, 213320, 549299, 1098598, 2197196, 2746495, 4394392, 5492990, 10985980, 21971960]

約数ペア:

[(1, 21971960), (2, 10985980), (4, 5492990), (5, 4394392), (8, 2746495), (10, 2197196), (20, 1098598), (40, 549299), (103, 213320), (206, 106660), (412, 53330), (515, 42664), (824, 26665), (1030, 21332), (2060, 10666), (4120, 5333)]