28209890

素因数分解:

$2^1\times 5^1\times {\mathrm{251}}^1\times {\mathrm{11239}}^1$

素因数の和:11497

約数の個数: 16

約数和(自身を含む): 50984640

約数和(自身を除く): 22774750

約数列:

[1, 2, 5, 10, 251, 502, 1255, 2510, 11239, 22478, 56195, 112390, 2820989, 5641978, 14104945, 28209890]

約数ペア:

[(1, 28209890), (2, 14104945), (5, 5641978), (10, 2820989), (251, 112390), (502, 56195), (1255, 22478), (2510, 11239)]