31782220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{239}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 68745600

約数和(自身を除く): 36963380

約数列:

[1, 2, 4, 5, 10, 20, 61, 109, 122, 218, 239, 244, 305, 436, 478, 545, 610, 956, 1090, 1195, 1220, 2180, 2390, 4780, 6649, 13298, 14579, 26051, 26596, 29158, 33245, 52102, 58316, 66490, 72895, 104204, 130255, 132980, 145790, 260510, 291580, 521020, 1589111, 3178222, 6356444, 7945555, 15891110, 31782220]

約数ペア:

[(1, 31782220), (2, 15891110), (4, 7945555), (5, 6356444), (10, 3178222), (20, 1589111), (61, 521020), (109, 291580), (122, 260510), (218, 145790), (239, 132980), (244, 130255), (305, 104204), (436, 72895), (478, 66490), (545, 58316), (610, 52102), (956, 33245), (1090, 29158), (1195, 26596), (1220, 26051), (2180, 14579), (2390, 13298), (4780, 6649)]