31401880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{11057}}^1$

素因数の和:11139

約数の個数: 32

約数和(自身を含む): 71655840

約数和(自身を除く): 40253960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 11057, 22114, 44228, 55285, 88456, 110570, 221140, 442280, 785047, 1570094, 3140188, 3925235, 6280376, 7850470, 15700940, 31401880]

約数ペア:

[(1, 31401880), (2, 15700940), (4, 7850470), (5, 6280376), (8, 3925235), (10, 3140188), (20, 1570094), (40, 785047), (71, 442280), (142, 221140), (284, 110570), (355, 88456), (568, 55285), (710, 44228), (1420, 22114), (2840, 11057)]