21780716

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{367}}^1\times {\mathrm{401}}^1$

素因数の和:809

約数の個数: 24

約数和(自身を含む): 39350976

約数和(自身を除く): 17570260

約数列:

[1, 2, 4, 37, 74, 148, 367, 401, 734, 802, 1468, 1604, 13579, 14837, 27158, 29674, 54316, 59348, 147167, 294334, 588668, 5445179, 10890358, 21780716]

約数ペア:

[(1, 21780716), (2, 10890358), (4, 5445179), (37, 588668), (74, 294334), (148, 147167), (367, 59348), (401, 54316), (734, 29674), (802, 27158), (1468, 14837), (1604, 13579)]