20994248

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{3911}}^1$

素因数の和:3989

約数の個数: 32

約数和(自身を含む): 43657920

約数和(自身を除く): 22663672

約数列:

[1, 2, 4, 8, 11, 22, 44, 61, 88, 122, 244, 488, 671, 1342, 2684, 3911, 5368, 7822, 15644, 31288, 43021, 86042, 172084, 238571, 344168, 477142, 954284, 1908568, 2624281, 5248562, 10497124, 20994248]

約数ペア:

[(1, 20994248), (2, 10497124), (4, 5248562), (8, 2624281), (11, 1908568), (22, 954284), (44, 477142), (61, 344168), (88, 238571), (122, 172084), (244, 86042), (488, 43021), (671, 31288), (1342, 15644), (2684, 7822), (3911, 5368)]