21379220

素因数分解:

$2^2\times 5^1\times {\mathrm{653}}^1\times {\mathrm{1637}}^1$

素因数の和:2299

約数の個数: 24

約数和(自身を含む): 44992584

約数和(自身を除く): 23613364

約数列:

[1, 2, 4, 5, 10, 20, 653, 1306, 1637, 2612, 3265, 3274, 6530, 6548, 8185, 13060, 16370, 32740, 1068961, 2137922, 4275844, 5344805, 10689610, 21379220]

約数ペア:

[(1, 21379220), (2, 10689610), (4, 5344805), (5, 4275844), (10, 2137922), (20, 1068961), (653, 32740), (1306, 16370), (1637, 13060), (2612, 8185), (3265, 6548), (3274, 6530)]