21218666

素因数分解:

$2^1\times 7^3\times {\mathrm{30931}}^1$

素因数の和:30954

約数の個数: 16

約数和(自身を含む): 37118400

約数和(自身を除く): 15899734

約数列:

[1, 2, 7, 14, 49, 98, 343, 686, 30931, 61862, 216517, 433034, 1515619, 3031238, 10609333, 21218666]

約数ペア:

[(1, 21218666), (2, 10609333), (7, 3031238), (14, 1515619), (49, 433034), (98, 216517), (343, 61862), (686, 30931)]