20686875

素因数分解:

$3^1\times 5^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1$

素因数の和:110

約数の個数: 80

約数和(自身を含む): 40487040

約数和(自身を除く): 19800165

約数列:

[1, 3, 5, 11, 15, 17, 25, 33, 51, 55, 59, 75, 85, 125, 165, 177, 187, 255, 275, 295, 375, 425, 561, 625, 649, 825, 885, 935, 1003, 1275, 1375, 1475, 1875, 1947, 2125, 2805, 3009, 3245, 4125, 4425, 4675, 5015, 6375, 6875, 7375, 9735, 10625, 11033, 14025, 15045, 16225, 20625, 22125, 23375, 25075, 31875, 33099, 36875, 48675, 55165, 70125, 75225, 81125, 110625, 116875, 125375, 165495, 243375, 275825, 350625, 376125, 405625, 626875, 827475, 1216875, 1379125, 1880625, 4137375, 6895625, 20686875]

約数ペア:

[(1, 20686875), (3, 6895625), (5, 4137375), (11, 1880625), (15, 1379125), (17, 1216875), (25, 827475), (33, 626875), (51, 405625), (55, 376125), (59, 350625), (75, 275825), (85, 243375), (125, 165495), (165, 125375), (177, 116875), (187, 110625), (255, 81125), (275, 75225), (295, 70125), (375, 55165), (425, 48675), (561, 36875), (625, 33099), (649, 31875), (825, 25075), (885, 23375), (935, 22125), (1003, 20625), (1275, 16225), (1375, 15045), (1475, 14025), (1875, 11033), (1947, 10625), (2125, 9735), (2805, 7375), (3009, 6875), (3245, 6375), (4125, 5015), (4425, 4675)]