21388257

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{5839}}^1$

素因数の和:5893

約数の個数: 24

約数和(自身を含む): 34619520

約数和(自身を除く): 13231263

約数列:

[1, 3, 9, 11, 33, 37, 99, 111, 333, 407, 1221, 3663, 5839, 17517, 52551, 64229, 192687, 216043, 578061, 648129, 1944387, 2376473, 7129419, 21388257]

約数ペア:

[(1, 21388257), (3, 7129419), (9, 2376473), (11, 1944387), (33, 648129), (37, 578061), (99, 216043), (111, 192687), (333, 64229), (407, 52551), (1221, 17517), (3663, 5839)]