81278235

素因数分解:

$3^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1987}}^1$

素因数の和:2105

約数の個数: 40

約数和(自身を含む): 147215376

約数和(自身を除く): 65937141

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 101, 135, 303, 405, 505, 909, 1515, 1987, 2727, 4545, 5961, 8181, 9935, 13635, 17883, 29805, 40905, 53649, 89415, 160947, 200687, 268245, 602061, 804735, 1003435, 1806183, 3010305, 5418549, 9030915, 16255647, 27092745, 81278235]

約数ペア:

[(1, 81278235), (3, 27092745), (5, 16255647), (9, 9030915), (15, 5418549), (27, 3010305), (45, 1806183), (81, 1003435), (101, 804735), (135, 602061), (303, 268245), (405, 200687), (505, 160947), (909, 89415), (1515, 53649), (1987, 40905), (2727, 29805), (4545, 17883), (5961, 13635), (8181, 9935)]