18419560

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7549}}^1$

素因数の和:7621

約数の個数: 32

約数和(自身を含む): 42129000

約数和(自身を除く): 23709440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7549, 15098, 30196, 37745, 60392, 75490, 150980, 301960, 460489, 920978, 1841956, 2302445, 3683912, 4604890, 9209780, 18419560]

約数ペア:

[(1, 18419560), (2, 9209780), (4, 4604890), (5, 3683912), (8, 2302445), (10, 1841956), (20, 920978), (40, 460489), (61, 301960), (122, 150980), (244, 75490), (305, 60392), (488, 37745), (610, 30196), (1220, 15098), (2440, 7549)]