71985915

素因数分解:

$3^4\times 5^1\times {\mathrm{177743}}^1$

素因数の和:177760

約数の個数: 20

約数和(自身を含む): 129042144

約数和(自身を除く): 57056229

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 177743, 533229, 888715, 1599687, 2666145, 4799061, 7998435, 14397183, 23995305, 71985915]

約数ペア:

[(1, 71985915), (3, 23995305), (5, 14397183), (9, 7998435), (15, 4799061), (27, 2666145), (45, 1599687), (81, 888715), (135, 533229), (405, 177743)]