20861390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{3109}}^1$

素因数の和:3188

約数の個数: 32

約数和(自身を含む): 41649120

約数和(自身を除く): 20787730

約数列:

[1, 2, 5, 10, 11, 22, 55, 61, 110, 122, 305, 610, 671, 1342, 3109, 3355, 6218, 6710, 15545, 31090, 34199, 68398, 170995, 189649, 341990, 379298, 948245, 1896490, 2086139, 4172278, 10430695, 20861390]

約数ペア:

[(1, 20861390), (2, 10430695), (5, 4172278), (10, 2086139), (11, 1896490), (22, 948245), (55, 379298), (61, 341990), (110, 189649), (122, 170995), (305, 68398), (610, 34199), (671, 31090), (1342, 15545), (3109, 6710), (3355, 6218)]