18491170490

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{521}}^1\times {\mathrm{21001}}^1$

素因数の和:21555

約数の個数: 48

約数和(自身を含む): 36112266936

約数和(自身を除く): 17621096446

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 521, 845, 1042, 1690, 2605, 5210, 6773, 13546, 21001, 33865, 42002, 67730, 88049, 105005, 176098, 210010, 273013, 440245, 546026, 880490, 1365065, 2730130, 3549169, 7098338, 10941521, 17745845, 21883042, 35491690, 54707605, 109415210, 142239773, 284479546, 711198865, 1422397730, 1849117049, 3698234098, 9245585245, 18491170490]

約数ペア:

[(1, 18491170490), (2, 9245585245), (5, 3698234098), (10, 1849117049), (13, 1422397730), (26, 711198865), (65, 284479546), (130, 142239773), (169, 109415210), (338, 54707605), (521, 35491690), (845, 21883042), (1042, 17745845), (1690, 10941521), (2605, 7098338), (5210, 3549169), (6773, 2730130), (13546, 1365065), (21001, 880490), (33865, 546026), (42002, 440245), (67730, 273013), (88049, 210010), (105005, 176098)]