21801215

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{3271}}^1$

素因数の和:3350

約数の個数: 16

約数和(自身を含む): 27641856

約数和(自身を除く): 5840641

約数列:

[1, 5, 31, 43, 155, 215, 1333, 3271, 6665, 16355, 101401, 140653, 507005, 703265, 4360243, 21801215]

約数ペア:

[(1, 21801215), (5, 4360243), (31, 703265), (43, 507005), (155, 140653), (215, 101401), (1333, 16355), (3271, 6665)]