21376535

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{643}}^1$

素因数の和:818

約数の個数: 16

約数和(自身を含む): 26352480

約数和(自身を除く): 4975945

約数列:

[1, 5, 61, 109, 305, 545, 643, 3215, 6649, 33245, 39223, 70087, 196115, 350435, 4275307, 21376535]

約数ペア:

[(1, 21376535), (5, 4275307), (61, 350435), (109, 196115), (305, 70087), (545, 39223), (643, 33245), (3215, 6649)]