18487720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11273}}^1$

素因数の和:11325

約数の個数: 32

約数和(自身を含む): 42615720

約数和(自身を除く): 24128000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 11273, 22546, 45092, 56365, 90184, 112730, 225460, 450920, 462193, 924386, 1848772, 2310965, 3697544, 4621930, 9243860, 18487720]

約数ペア:

[(1, 18487720), (2, 9243860), (4, 4621930), (5, 3697544), (8, 2310965), (10, 1848772), (20, 924386), (40, 462193), (41, 450920), (82, 225460), (164, 112730), (205, 90184), (328, 56365), (410, 45092), (820, 22546), (1640, 11273)]