21400784

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{16931}}^1$

素因数の和:17018

約数の個数: 20

約数和(自身を含む): 41991360

約数和(自身を除く): 20590576

約数列:

[1, 2, 4, 8, 16, 79, 158, 316, 632, 1264, 16931, 33862, 67724, 135448, 270896, 1337549, 2675098, 5350196, 10700392, 21400784]

約数ペア:

[(1, 21400784), (2, 10700392), (4, 5350196), (8, 2675098), (16, 1337549), (79, 270896), (158, 135448), (316, 67724), (632, 33862), (1264, 16931)]