18320440

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11171}}^1$

素因数の和:11223

約数の個数: 32

約数和(自身を含む): 42230160

約数和(自身を除く): 23909720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 11171, 22342, 44684, 55855, 89368, 111710, 223420, 446840, 458011, 916022, 1832044, 2290055, 3664088, 4580110, 9160220, 18320440]

約数ペア:

[(1, 18320440), (2, 9160220), (4, 4580110), (5, 3664088), (8, 2290055), (10, 1832044), (20, 916022), (40, 458011), (41, 446840), (82, 223420), (164, 111710), (205, 89368), (328, 55855), (410, 44684), (820, 22342), (1640, 11171)]