18946520

素因数分解:

$2^3\times 5^1\times {\mathrm{263}}^1\times {\mathrm{1801}}^1$

素因数の和:2075

約数の個数: 32

約数和(自身を含む): 42815520

約数和(自身を除く): 23869000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 263, 526, 1052, 1315, 1801, 2104, 2630, 3602, 5260, 7204, 9005, 10520, 14408, 18010, 36020, 72040, 473663, 947326, 1894652, 2368315, 3789304, 4736630, 9473260, 18946520]

約数ペア:

[(1, 18946520), (2, 9473260), (4, 4736630), (5, 3789304), (8, 2368315), (10, 1894652), (20, 947326), (40, 473663), (263, 72040), (526, 36020), (1052, 18010), (1315, 14408), (1801, 10520), (2104, 9005), (2630, 7204), (3602, 5260)]