18646780

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{239}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 40642560

約数和(自身を除く): 21995780

約数列:

[1, 2, 4, 5, 10, 20, 47, 83, 94, 166, 188, 235, 239, 332, 415, 470, 478, 830, 940, 956, 1195, 1660, 2390, 3901, 4780, 7802, 11233, 15604, 19505, 19837, 22466, 39010, 39674, 44932, 56165, 78020, 79348, 99185, 112330, 198370, 224660, 396740, 932339, 1864678, 3729356, 4661695, 9323390, 18646780]

約数ペア:

[(1, 18646780), (2, 9323390), (4, 4661695), (5, 3729356), (10, 1864678), (20, 932339), (47, 396740), (83, 224660), (94, 198370), (166, 112330), (188, 99185), (235, 79348), (239, 78020), (332, 56165), (415, 44932), (470, 39674), (478, 39010), (830, 22466), (940, 19837), (956, 19505), (1195, 15604), (1660, 11233), (2390, 7802), (3901, 4780)]