21537775

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{5351}}^1$

素因数の和:5391

約数の個数: 24

約数和(自身を含む): 31855104

約数和(自身を除く): 10317329

約数列:

[1, 5, 7, 23, 25, 35, 115, 161, 175, 575, 805, 4025, 5351, 26755, 37457, 123073, 133775, 187285, 615365, 861511, 936425, 3076825, 4307555, 21537775]

約数ペア:

[(1, 21537775), (5, 4307555), (7, 3076825), (23, 936425), (25, 861511), (35, 615365), (115, 187285), (161, 133775), (175, 123073), (575, 37457), (805, 26755), (4025, 5351)]