71721555

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{2053}}^1$

素因数の和:2215

約数の個数: 32

約数和(自身を含む): 122451264

約数和(自身を除く): 50729709

約数列:

[1, 3, 5, 15, 17, 51, 85, 137, 255, 411, 685, 2053, 2055, 2329, 6159, 6987, 10265, 11645, 30795, 34901, 34935, 104703, 174505, 281261, 523515, 843783, 1406305, 4218915, 4781437, 14344311, 23907185, 71721555]

約数ペア:

[(1, 71721555), (3, 23907185), (5, 14344311), (15, 4781437), (17, 4218915), (51, 1406305), (85, 843783), (137, 523515), (255, 281261), (411, 174505), (685, 104703), (2053, 34935), (2055, 34901), (2329, 30795), (6159, 11645), (6987, 10265)]