20609575

素因数分解:

$5^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 31426560

約数和(自身を除く): 10816985

約数列:

[1, 5, 7, 25, 29, 31, 35, 131, 145, 155, 175, 203, 217, 655, 725, 775, 899, 917, 1015, 1085, 3275, 3799, 4061, 4495, 4585, 5075, 5425, 6293, 18995, 20305, 22475, 22925, 26593, 28427, 31465, 94975, 101525, 117769, 132965, 142135, 157325, 588845, 664825, 710675, 824383, 2944225, 4121915, 20609575]

約数ペア:

[(1, 20609575), (5, 4121915), (7, 2944225), (25, 824383), (29, 710675), (31, 664825), (35, 588845), (131, 157325), (145, 142135), (155, 132965), (175, 117769), (203, 101525), (217, 94975), (655, 31465), (725, 28427), (775, 26593), (899, 22925), (917, 22475), (1015, 20305), (1085, 18995), (3275, 6293), (3799, 5425), (4061, 5075), (4495, 4585)]