20403568

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1637}}^1$

素因数の和:1705

約数の個数: 40

約数和(自身を含む): 42653520

約数和(自身を除く): 22249952

約数列:

[1, 2, 4, 8, 16, 19, 38, 41, 76, 82, 152, 164, 304, 328, 656, 779, 1558, 1637, 3116, 3274, 6232, 6548, 12464, 13096, 26192, 31103, 62206, 67117, 124412, 134234, 248824, 268468, 497648, 536936, 1073872, 1275223, 2550446, 5100892, 10201784, 20403568]

約数ペア:

[(1, 20403568), (2, 10201784), (4, 5100892), (8, 2550446), (16, 1275223), (19, 1073872), (38, 536936), (41, 497648), (76, 268468), (82, 248824), (152, 134234), (164, 124412), (304, 67117), (328, 62206), (656, 31103), (779, 26192), (1558, 13096), (1637, 12464), (3116, 6548), (3274, 6232)]