18668870

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:245

約数の個数: 64

約数和(自身を含む): 39315456

約数和(自身を除く): 20646586

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 47, 55, 94, 110, 115, 157, 230, 235, 253, 314, 470, 506, 517, 785, 1034, 1081, 1265, 1570, 1727, 2162, 2530, 2585, 3454, 3611, 5170, 5405, 7222, 7379, 8635, 10810, 11891, 14758, 17270, 18055, 23782, 36110, 36895, 39721, 59455, 73790, 79442, 81169, 118910, 162338, 169717, 198605, 339434, 397210, 405845, 811690, 848585, 1697170, 1866887, 3733774, 9334435, 18668870]

約数ペア:

[(1, 18668870), (2, 9334435), (5, 3733774), (10, 1866887), (11, 1697170), (22, 848585), (23, 811690), (46, 405845), (47, 397210), (55, 339434), (94, 198605), (110, 169717), (115, 162338), (157, 118910), (230, 81169), (235, 79442), (253, 73790), (314, 59455), (470, 39721), (506, 36895), (517, 36110), (785, 23782), (1034, 18055), (1081, 17270), (1265, 14758), (1570, 11891), (1727, 10810), (2162, 8635), (2530, 7379), (2585, 7222), (3454, 5405), (3611, 5170)]