18821990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{1231}}^1$

素因数の和:1388

約数の個数: 32

約数和(自身を含む): 37255680

約数和(自身を除く): 18433690

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 139, 278, 695, 1231, 1390, 1529, 2462, 3058, 6155, 7645, 12310, 13541, 15290, 27082, 67705, 135410, 171109, 342218, 855545, 1711090, 1882199, 3764398, 9410995, 18821990]

約数ペア:

[(1, 18821990), (2, 9410995), (5, 3764398), (10, 1882199), (11, 1711090), (22, 855545), (55, 342218), (110, 171109), (139, 135410), (278, 67705), (695, 27082), (1231, 15290), (1390, 13541), (1529, 12310), (2462, 7645), (3058, 6155)]