21939440

素因数分解:

$2^4\times 5^1\times {\mathrm{274243}}^1$

素因数の和:274256

約数の個数: 20

約数和(自身を含む): 51009384

約数和(自身を除く): 29069944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274243, 548486, 1096972, 1371215, 2193944, 2742430, 4387888, 5484860, 10969720, 21939440]

約数ペア:

[(1, 21939440), (2, 10969720), (4, 5484860), (5, 4387888), (8, 2742430), (10, 2193944), (16, 1371215), (20, 1096972), (40, 548486), (80, 274243)]