21039075

素因数分解:

$3^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{439}}^1$

素因数の和:529

約数の個数: 48

約数和(自身を含む): 39283200

約数和(自身を除く): 18244125

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 71, 75, 135, 213, 225, 355, 439, 639, 675, 1065, 1317, 1775, 1917, 2195, 3195, 3951, 5325, 6585, 9585, 10975, 11853, 15975, 19755, 31169, 32925, 47925, 59265, 93507, 98775, 155845, 280521, 296325, 467535, 779225, 841563, 1402605, 2337675, 4207815, 7013025, 21039075]

約数ペア:

[(1, 21039075), (3, 7013025), (5, 4207815), (9, 2337675), (15, 1402605), (25, 841563), (27, 779225), (45, 467535), (71, 296325), (75, 280521), (135, 155845), (213, 98775), (225, 93507), (355, 59265), (439, 47925), (639, 32925), (675, 31169), (1065, 19755), (1317, 15975), (1775, 11853), (1917, 10975), (2195, 9585), (3195, 6585), (3951, 5325)]