643669136

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{77813}}^1$

素因数の和:77879

約数の個数: 40

約数和(自身を含む): 1389446784

約数和(自身を除く): 745777648

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 47, 88, 94, 176, 188, 376, 517, 752, 1034, 2068, 4136, 8272, 77813, 155626, 311252, 622504, 855943, 1245008, 1711886, 3423772, 3657211, 6847544, 7314422, 13695088, 14628844, 29257688, 40229321, 58515376, 80458642, 160917284, 321834568, 643669136]

約数ペア:

[(1, 643669136), (2, 321834568), (4, 160917284), (8, 80458642), (11, 58515376), (16, 40229321), (22, 29257688), (44, 14628844), (47, 13695088), (88, 7314422), (94, 6847544), (176, 3657211), (188, 3423772), (376, 1711886), (517, 1245008), (752, 855943), (1034, 622504), (2068, 311252), (4136, 155626), (8272, 77813)]