18378815

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1303}}^1$

素因数の和:1359

約数の個数: 32

約数和(自身を含む): 28041216

約数和(自身を除く): 9662401

約数列:

[1, 5, 7, 13, 31, 35, 65, 91, 155, 217, 403, 455, 1085, 1303, 2015, 2821, 6515, 9121, 14105, 16939, 40393, 45605, 84695, 118573, 201965, 282751, 525109, 592865, 1413755, 2625545, 3675763, 18378815]

約数ペア:

[(1, 18378815), (5, 3675763), (7, 2625545), (13, 1413755), (31, 592865), (35, 525109), (65, 282751), (91, 201965), (155, 118573), (217, 84695), (403, 45605), (455, 40393), (1085, 16939), (1303, 14105), (2015, 9121), (2821, 6515)]