21057520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23929}}^1$

素因数の和:23953

約数の個数: 40

約数和(自身を含む): 53411760

約数和(自身を除く): 32354240

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23929, 47858, 95716, 119645, 191432, 239290, 263219, 382864, 478580, 526438, 957160, 1052876, 1316095, 1914320, 2105752, 2632190, 4211504, 5264380, 10528760, 21057520]

約数ペア:

[(1, 21057520), (2, 10528760), (4, 5264380), (5, 4211504), (8, 2632190), (10, 2105752), (11, 1914320), (16, 1316095), (20, 1052876), (22, 957160), (40, 526438), (44, 478580), (55, 382864), (80, 263219), (88, 239290), (110, 191432), (176, 119645), (220, 95716), (440, 47858), (880, 23929)]