28877080

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{163}}^1$

素因数の和:320

約数の個数: 64

約数和(自身を含む): 67541760

約数和(自身を除く): 38664680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 103, 163, 172, 206, 215, 326, 344, 412, 430, 515, 652, 815, 824, 860, 1030, 1304, 1630, 1720, 2060, 3260, 4120, 4429, 6520, 7009, 8858, 14018, 16789, 17716, 22145, 28036, 33578, 35045, 35432, 44290, 56072, 67156, 70090, 83945, 88580, 134312, 140180, 167890, 177160, 280360, 335780, 671560, 721927, 1443854, 2887708, 3609635, 5775416, 7219270, 14438540, 28877080]

約数ペア:

[(1, 28877080), (2, 14438540), (4, 7219270), (5, 5775416), (8, 3609635), (10, 2887708), (20, 1443854), (40, 721927), (43, 671560), (86, 335780), (103, 280360), (163, 177160), (172, 167890), (206, 140180), (215, 134312), (326, 88580), (344, 83945), (412, 70090), (430, 67156), (515, 56072), (652, 44290), (815, 35432), (824, 35045), (860, 33578), (1030, 28036), (1304, 22145), (1630, 17716), (1720, 16789), (2060, 14018), (3260, 8858), (4120, 7009), (4429, 6520)]