21229364

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{631}}^1\times {\mathrm{647}}^1$

素因数の和:1295

約数の個数: 24

約数和(自身を含む): 40134528

約数和(自身を除く): 18905164

約数列:

[1, 2, 4, 13, 26, 52, 631, 647, 1262, 1294, 2524, 2588, 8203, 8411, 16406, 16822, 32812, 33644, 408257, 816514, 1633028, 5307341, 10614682, 21229364]

約数ペア:

[(1, 21229364), (2, 10614682), (4, 5307341), (13, 1633028), (26, 816514), (52, 408257), (631, 33644), (647, 32812), (1262, 16822), (1294, 16406), (2524, 8411), (2588, 8203)]