21571408

素因数分解:

$2^4\times {\mathrm{1097}}^1\times {\mathrm{1229}}^1$

素因数の和:2334

約数の個数: 20

約数和(自身を含む): 41866740

約数和(自身を除く): 20295332

約数列:

[1, 2, 4, 8, 16, 1097, 1229, 2194, 2458, 4388, 4916, 8776, 9832, 17552, 19664, 1348213, 2696426, 5392852, 10785704, 21571408]

約数ペア:

[(1, 21571408), (2, 10785704), (4, 5392852), (8, 2696426), (16, 1348213), (1097, 19664), (1229, 17552), (2194, 9832), (2458, 8776), (4388, 4916)]