20065540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{409}}^1$

素因数の和:652

約数の個数: 48

約数和(自身を含む): 46287360

約数和(自身を除く): 26221820

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 223, 409, 446, 818, 892, 1115, 1636, 2045, 2230, 2453, 4090, 4460, 4499, 4906, 8180, 8998, 9812, 12265, 17996, 22495, 24530, 44990, 49060, 89980, 91207, 182414, 364828, 456035, 912070, 1003277, 1824140, 2006554, 4013108, 5016385, 10032770, 20065540]

約数ペア:

[(1, 20065540), (2, 10032770), (4, 5016385), (5, 4013108), (10, 2006554), (11, 1824140), (20, 1003277), (22, 912070), (44, 456035), (55, 364828), (110, 182414), (220, 91207), (223, 89980), (409, 49060), (446, 44990), (818, 24530), (892, 22495), (1115, 17996), (1636, 12265), (2045, 9812), (2230, 8998), (2453, 8180), (4090, 4906), (4460, 4499)]