399683560

素因数分解:

$2^3\times 5^1\times {\mathrm{149}}^1\times {\mathrm{67061}}^1$

素因数の和:67221

約数の個数: 32

約数和(自身を含む): 905337000

約数和(自身を除く): 505653440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 149, 298, 596, 745, 1192, 1490, 2980, 5960, 67061, 134122, 268244, 335305, 536488, 670610, 1341220, 2682440, 9992089, 19984178, 39968356, 49960445, 79936712, 99920890, 199841780, 399683560]

約数ペア:

[(1, 399683560), (2, 199841780), (4, 99920890), (5, 79936712), (8, 49960445), (10, 39968356), (20, 19984178), (40, 9992089), (149, 2682440), (298, 1341220), (596, 670610), (745, 536488), (1192, 335305), (1490, 268244), (2980, 134122), (5960, 67061)]