21040828

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{251}}^1\times {\mathrm{1103}}^1$

素因数の和:1377

約数の個数: 24

約数和(自身を含む): 38949120

約数和(自身を除く): 17908292

約数列:

[1, 2, 4, 19, 38, 76, 251, 502, 1004, 1103, 2206, 4412, 4769, 9538, 19076, 20957, 41914, 83828, 276853, 553706, 1107412, 5260207, 10520414, 21040828]

約数ペア:

[(1, 21040828), (2, 10520414), (4, 5260207), (19, 1107412), (38, 553706), (76, 276853), (251, 83828), (502, 41914), (1004, 20957), (1103, 19076), (2206, 9538), (4412, 4769)]