21320808

素因数分解:

$2^3\times 3^1\times {\mathrm{31}}^1\times {\mathrm{28657}}^1$

素因数の和:28697

約数の個数: 32

約数和(自身を含む): 55023360

約数和(自身を除く): 33702552

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 31, 62, 93, 124, 186, 248, 372, 744, 28657, 57314, 85971, 114628, 171942, 229256, 343884, 687768, 888367, 1776734, 2665101, 3553468, 5330202, 7106936, 10660404, 21320808]

約数ペア:

[(1, 21320808), (2, 10660404), (3, 7106936), (4, 5330202), (6, 3553468), (8, 2665101), (12, 1776734), (24, 888367), (31, 687768), (62, 343884), (93, 229256), (124, 171942), (186, 114628), (248, 85971), (372, 57314), (744, 28657)]