21213543

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{241}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 31928512

約数和(自身を除く): 10714969

約数列:

[1, 3, 13, 37, 39, 61, 111, 183, 241, 481, 723, 793, 1443, 2257, 2379, 3133, 6771, 8917, 9399, 14701, 26751, 29341, 44103, 88023, 115921, 191113, 347763, 543937, 573339, 1631811, 7071181, 21213543]

約数ペア:

[(1, 21213543), (3, 7071181), (13, 1631811), (37, 573339), (39, 543937), (61, 347763), (111, 191113), (183, 115921), (241, 88023), (481, 44103), (723, 29341), (793, 26751), (1443, 14701), (2257, 9399), (2379, 8917), (3133, 6771)]