81365625

素因数分解:

$3^2\times 5^5\times {\mathrm{11}}^1\times {\mathrm{263}}^1$

素因数の和:305

約数の個数: 72

約数和(自身を含む): 160864704

約数和(自身を除く): 79499079

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 75, 99, 125, 165, 225, 263, 275, 375, 495, 625, 789, 825, 1125, 1315, 1375, 1875, 2367, 2475, 2893, 3125, 3945, 4125, 5625, 6575, 6875, 8679, 9375, 11835, 12375, 14465, 19725, 20625, 26037, 28125, 32875, 34375, 43395, 59175, 61875, 72325, 98625, 103125, 130185, 164375, 216975, 295875, 309375, 361625, 493125, 650925, 821875, 1084875, 1479375, 1808125, 2465625, 3254625, 5424375, 7396875, 9040625, 16273125, 27121875, 81365625]

約数ペア:

[(1, 81365625), (3, 27121875), (5, 16273125), (9, 9040625), (11, 7396875), (15, 5424375), (25, 3254625), (33, 2465625), (45, 1808125), (55, 1479375), (75, 1084875), (99, 821875), (125, 650925), (165, 493125), (225, 361625), (263, 309375), (275, 295875), (375, 216975), (495, 164375), (625, 130185), (789, 103125), (825, 98625), (1125, 72325), (1315, 61875), (1375, 59175), (1875, 43395), (2367, 34375), (2475, 32875), (2893, 28125), (3125, 26037), (3945, 20625), (4125, 19725), (5625, 14465), (6575, 12375), (6875, 11835), (8679, 9375)]