21515395

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12619}}^1$

素因数の和:12666

約数の個数: 16

約数和(自身を含む): 29076480

約数和(自身を除く): 7561085

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12619, 63095, 138809, 391189, 694045, 1955945, 4303079, 21515395]

約数ペア:

[(1, 21515395), (5, 4303079), (11, 1955945), (31, 694045), (55, 391189), (155, 138809), (341, 63095), (1705, 12619)]