20308912

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{389}}^1$

素因数の和:661

約数の個数: 40

約数和(自身を含む): 42653520

約数和(自身を除く): 22344608

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 251, 389, 502, 778, 1004, 1556, 2008, 3112, 3263, 4016, 5057, 6224, 6526, 10114, 13052, 20228, 26104, 40456, 52208, 80912, 97639, 195278, 390556, 781112, 1269307, 1562224, 2538614, 5077228, 10154456, 20308912]

約数ペア:

[(1, 20308912), (2, 10154456), (4, 5077228), (8, 2538614), (13, 1562224), (16, 1269307), (26, 781112), (52, 390556), (104, 195278), (208, 97639), (251, 80912), (389, 52208), (502, 40456), (778, 26104), (1004, 20228), (1556, 13052), (2008, 10114), (3112, 6526), (3263, 6224), (4016, 5057)]