21385165

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{229}}^1\times {\mathrm{983}}^1$

素因数の和:1236

約数の個数: 16

約数和(自身を含む): 27158400

約数和(自身を除く): 5773235

約数列:

[1, 5, 19, 95, 229, 983, 1145, 4351, 4915, 18677, 21755, 93385, 225107, 1125535, 4277033, 21385165]

約数ペア:

[(1, 21385165), (5, 4277033), (19, 1125535), (95, 225107), (229, 93385), (983, 21755), (1145, 18677), (4351, 4915)]