20881628

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{811}}^1$

素因数の和:1013

約数の個数: 24

約数和(自身を含む): 37719024

約数和(自身を除く): 16837396

約数列:

[1, 2, 4, 41, 82, 157, 164, 314, 628, 811, 1622, 3244, 6437, 12874, 25748, 33251, 66502, 127327, 133004, 254654, 509308, 5220407, 10440814, 20881628]

約数ペア:

[(1, 20881628), (2, 10440814), (4, 5220407), (41, 509308), (82, 254654), (157, 133004), (164, 127327), (314, 66502), (628, 33251), (811, 25748), (1622, 12874), (3244, 6437)]