21690695

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:395

約数の個数: 32

約数和(自身を含む): 29877120

約数和(自身を除く): 8186425

約数列:

[1, 5, 13, 29, 37, 65, 145, 185, 311, 377, 481, 1073, 1555, 1885, 2405, 4043, 5365, 9019, 11507, 13949, 20215, 45095, 57535, 69745, 117247, 149591, 333703, 586235, 747955, 1668515, 4338139, 21690695]

約数ペア:

[(1, 21690695), (5, 4338139), (13, 1668515), (29, 747955), (37, 586235), (65, 333703), (145, 149591), (185, 117247), (311, 69745), (377, 57535), (481, 45095), (1073, 20215), (1555, 13949), (1885, 11507), (2405, 9019), (4043, 5365)]