18868880

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{1447}}^1$

素因数の和:1623

約数の個数: 40

約数和(自身を含む): 44169792

約数和(自身を除く): 25300912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1447, 1630, 2608, 2894, 3260, 5788, 6520, 7235, 11576, 13040, 14470, 23152, 28940, 57880, 115760, 235861, 471722, 943444, 1179305, 1886888, 2358610, 3773776, 4717220, 9434440, 18868880]

約数ペア:

[(1, 18868880), (2, 9434440), (4, 4717220), (5, 3773776), (8, 2358610), (10, 1886888), (16, 1179305), (20, 943444), (40, 471722), (80, 235861), (163, 115760), (326, 57880), (652, 28940), (815, 23152), (1304, 14470), (1447, 13040), (1630, 11576), (2608, 7235), (2894, 6520), (3260, 5788)]