19993405

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1\times {\mathrm{251}}^1$

素因数の和:524

約数の個数: 16

約数和(自身を含む): 24494400

約数和(自身を除く): 4500995

約数列:

[1, 5, 89, 179, 251, 445, 895, 1255, 15931, 22339, 44929, 79655, 111695, 224645, 3998681, 19993405]

約数ペア:

[(1, 19993405), (5, 3998681), (89, 224645), (179, 111695), (251, 79655), (445, 44929), (895, 22339), (1255, 15931)]