217440680

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{167}}^1\times {\mathrm{757}}^1$

素因数の和:978

約数の個数: 64

約数和(自身を含む): 504282240

約数和(自身を除く): 286841560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 167, 172, 215, 334, 344, 430, 668, 757, 835, 860, 1336, 1514, 1670, 1720, 3028, 3340, 3785, 6056, 6680, 7181, 7570, 14362, 15140, 28724, 30280, 32551, 35905, 57448, 65102, 71810, 126419, 130204, 143620, 162755, 252838, 260408, 287240, 325510, 505676, 632095, 651020, 1011352, 1264190, 1302040, 2528380, 5056760, 5436017, 10872034, 21744068, 27180085, 43488136, 54360170, 108720340, 217440680]

約数ペア:

[(1, 217440680), (2, 108720340), (4, 54360170), (5, 43488136), (8, 27180085), (10, 21744068), (20, 10872034), (40, 5436017), (43, 5056760), (86, 2528380), (167, 1302040), (172, 1264190), (215, 1011352), (334, 651020), (344, 632095), (430, 505676), (668, 325510), (757, 287240), (835, 260408), (860, 252838), (1336, 162755), (1514, 143620), (1670, 130204), (1720, 126419), (3028, 71810), (3340, 65102), (3785, 57448), (6056, 35905), (6680, 32551), (7181, 30280), (7570, 28724), (14362, 15140)]