81390530

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{21589}}^1$

素因数の和:21638

約数の個数: 32

約数和(自身を含む): 163220400

約数和(自身を除く): 81829870

約数列:

[1, 2, 5, 10, 13, 26, 29, 58, 65, 130, 145, 290, 377, 754, 1885, 3770, 21589, 43178, 107945, 215890, 280657, 561314, 626081, 1252162, 1403285, 2806570, 3130405, 6260810, 8139053, 16278106, 40695265, 81390530]

約数ペア:

[(1, 81390530), (2, 40695265), (5, 16278106), (10, 8139053), (13, 6260810), (26, 3130405), (29, 2806570), (58, 1403285), (65, 1252162), (130, 626081), (145, 561314), (290, 280657), (377, 215890), (754, 107945), (1885, 43178), (3770, 21589)]