20455600

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{4649}}^1$

素因数の和:4678

約数の個数: 60

約数和(自身を含む): 53623800

約数和(自身を除く): 33168200

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 110, 176, 200, 220, 275, 400, 440, 550, 880, 1100, 2200, 4400, 4649, 9298, 18596, 23245, 37192, 46490, 51139, 74384, 92980, 102278, 116225, 185960, 204556, 232450, 255695, 371920, 409112, 464900, 511390, 818224, 929800, 1022780, 1278475, 1859600, 2045560, 2556950, 4091120, 5113900, 10227800, 20455600]

約数ペア:

[(1, 20455600), (2, 10227800), (4, 5113900), (5, 4091120), (8, 2556950), (10, 2045560), (11, 1859600), (16, 1278475), (20, 1022780), (22, 929800), (25, 818224), (40, 511390), (44, 464900), (50, 409112), (55, 371920), (80, 255695), (88, 232450), (100, 204556), (110, 185960), (176, 116225), (200, 102278), (220, 92980), (275, 74384), (400, 51139), (440, 46490), (550, 37192), (880, 23245), (1100, 18596), (2200, 9298), (4400, 4649)]