20105709

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:277

約数の個数: 32

約数和(自身を含む): 30046464

約数和(自身を除く): 9940755

約数列:

[1, 3, 13, 39, 53, 71, 137, 159, 213, 411, 689, 923, 1781, 2067, 2769, 3763, 5343, 7261, 9727, 11289, 21783, 29181, 48919, 94393, 126451, 146757, 283179, 379353, 515531, 1546593, 6701903, 20105709]

約数ペア:

[(1, 20105709), (3, 6701903), (13, 1546593), (39, 515531), (53, 379353), (71, 283179), (137, 146757), (159, 126451), (213, 94393), (411, 48919), (689, 29181), (923, 21783), (1781, 11289), (2067, 9727), (2769, 7261), (3763, 5343)]