21285005

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{193}}^1$

素因数の和:365

約数の個数: 32

約数和(自身を含む): 30841344

約数和(自身を除く): 9556339

約数列:

[1, 5, 7, 23, 35, 115, 137, 161, 193, 685, 805, 959, 965, 1351, 3151, 4439, 4795, 6755, 15755, 22057, 22195, 26441, 31073, 110285, 132205, 155365, 185087, 608143, 925435, 3040715, 4257001, 21285005]

約数ペア:

[(1, 21285005), (5, 4257001), (7, 3040715), (23, 925435), (35, 608143), (115, 185087), (137, 155365), (161, 132205), (193, 110285), (685, 31073), (805, 26441), (959, 22195), (965, 22057), (1351, 15755), (3151, 6755), (4439, 4795)]