131451980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{54319}}^1$

素因数の和:54350

約数の個数: 36

約数和(自身を含む): 303431520

約数和(自身を除く): 171979540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 54319, 108638, 217276, 271595, 543190, 597509, 1086380, 1195018, 2390036, 2987545, 5975090, 6572599, 11950180, 13145198, 26290396, 32862995, 65725990, 131451980]

約数ペア:

[(1, 131451980), (2, 65725990), (4, 32862995), (5, 26290396), (10, 13145198), (11, 11950180), (20, 6572599), (22, 5975090), (44, 2987545), (55, 2390036), (110, 1195018), (121, 1086380), (220, 597509), (242, 543190), (484, 271595), (605, 217276), (1210, 108638), (2420, 54319)]