81978988

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{225217}}^1$

素因数の和:225241

約数の個数: 24

約数和(自身を含む): 176570912

約数和(自身を除く): 94591924

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 182, 364, 225217, 450434, 900868, 1576519, 2927821, 3153038, 5855642, 6306076, 11711284, 20494747, 40989494, 81978988]

約数ペア:

[(1, 81978988), (2, 40989494), (4, 20494747), (7, 11711284), (13, 6306076), (14, 5855642), (26, 3153038), (28, 2927821), (52, 1576519), (91, 900868), (182, 450434), (364, 225217)]