21216008

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{12689}}^1$

素因数の和:12725

約数の個数: 32

約数和(自身を含む): 45684000

約数和(自身を除く): 24467992

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 44, 76, 88, 152, 209, 418, 836, 1672, 12689, 25378, 50756, 101512, 139579, 241091, 279158, 482182, 558316, 964364, 1116632, 1928728, 2652001, 5304002, 10608004, 21216008]

約数ペア:

[(1, 21216008), (2, 10608004), (4, 5304002), (8, 2652001), (11, 1928728), (19, 1116632), (22, 964364), (38, 558316), (44, 482182), (76, 279158), (88, 241091), (152, 139579), (209, 101512), (418, 50756), (836, 25378), (1672, 12689)]