20020550

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{409}}^1$

素因数の和:521

約数の個数: 48

約数和(自身を含む): 41180400

約数和(自身を除く): 21159850

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 89, 110, 178, 275, 409, 445, 550, 818, 890, 979, 1958, 2045, 2225, 4090, 4450, 4499, 4895, 8998, 9790, 10225, 20450, 22495, 24475, 36401, 44990, 48950, 72802, 112475, 182005, 224950, 364010, 400411, 800822, 910025, 1820050, 2002055, 4004110, 10010275, 20020550]

約数ペア:

[(1, 20020550), (2, 10010275), (5, 4004110), (10, 2002055), (11, 1820050), (22, 910025), (25, 800822), (50, 400411), (55, 364010), (89, 224950), (110, 182005), (178, 112475), (275, 72802), (409, 48950), (445, 44990), (550, 36401), (818, 24475), (890, 22495), (979, 20450), (1958, 10225), (2045, 9790), (2225, 8998), (4090, 4895), (4450, 4499)]