20478375

素因数分解:

$3^2\times 5^3\times {\mathrm{109}}^1\times {\mathrm{167}}^1$

素因数の和:297

約数の個数: 48

約数和(自身を含む): 37477440

約数和(自身を除く): 16999065

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 109, 125, 167, 225, 327, 375, 501, 545, 835, 981, 1125, 1503, 1635, 2505, 2725, 4175, 4905, 7515, 8175, 12525, 13625, 18203, 20875, 24525, 37575, 40875, 54609, 62625, 91015, 122625, 163827, 187875, 273045, 455075, 819135, 1365225, 2275375, 4095675, 6826125, 20478375]

約数ペア:

[(1, 20478375), (3, 6826125), (5, 4095675), (9, 2275375), (15, 1365225), (25, 819135), (45, 455075), (75, 273045), (109, 187875), (125, 163827), (167, 122625), (225, 91015), (327, 62625), (375, 54609), (501, 40875), (545, 37575), (835, 24525), (981, 20875), (1125, 18203), (1503, 13625), (1635, 12525), (2505, 8175), (2725, 7515), (4175, 4905)]