81357880

素因数分解:

$2^3\times 5^1\times {\mathrm{523}}^1\times {\mathrm{3889}}^1$

素因数の和:4423

約数の個数: 32

約数和(自身を含む): 183452400

約数和(自身を除く): 102094520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 523, 1046, 2092, 2615, 3889, 4184, 5230, 7778, 10460, 15556, 19445, 20920, 31112, 38890, 77780, 155560, 2033947, 4067894, 8135788, 10169735, 16271576, 20339470, 40678940, 81357880]

約数ペア:

[(1, 81357880), (2, 40678940), (4, 20339470), (5, 16271576), (8, 10169735), (10, 8135788), (20, 4067894), (40, 2033947), (523, 155560), (1046, 77780), (2092, 38890), (2615, 31112), (3889, 20920), (4184, 19445), (5230, 15556), (7778, 10460)]