21756195

素因数分解:

$3^4\times 5^1\times {\mathrm{53719}}^1$

素因数の和:53736

約数の個数: 20

約数和(自身を含む): 39000720

約数和(自身を除く): 17244525

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53719, 161157, 268595, 483471, 805785, 1450413, 2417355, 4351239, 7252065, 21756195]

約数ペア:

[(1, 21756195), (3, 7252065), (5, 4351239), (9, 2417355), (15, 1450413), (27, 805785), (45, 483471), (81, 268595), (135, 161157), (405, 53719)]