18305680

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{5581}}^1$

素因数の和:5635

約数の個数: 40

約数和(自身を含む): 43606584

約数和(自身を除く): 25300904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 5581, 11162, 22324, 27905, 44648, 55810, 89296, 111620, 223240, 228821, 446480, 457642, 915284, 1144105, 1830568, 2288210, 3661136, 4576420, 9152840, 18305680]

約数ペア:

[(1, 18305680), (2, 9152840), (4, 4576420), (5, 3661136), (8, 2288210), (10, 1830568), (16, 1144105), (20, 915284), (40, 457642), (41, 446480), (80, 228821), (82, 223240), (164, 111620), (205, 89296), (328, 55810), (410, 44648), (656, 27905), (820, 22324), (1640, 11162), (3280, 5581)]