20381697

素因数分解:

$3^2\times 7^2\times {\mathrm{113}}^1\times {\mathrm{409}}^1$

素因数の和:542

約数の個数: 36

約数和(自身を含む): 34634340

約数和(自身を除く): 14252643

約数列:

[1, 3, 7, 9, 21, 49, 63, 113, 147, 339, 409, 441, 791, 1017, 1227, 2373, 2863, 3681, 5537, 7119, 8589, 16611, 20041, 25767, 46217, 49833, 60123, 138651, 180369, 323519, 415953, 970557, 2264633, 2911671, 6793899, 20381697]

約数ペア:

[(1, 20381697), (3, 6793899), (7, 2911671), (9, 2264633), (21, 970557), (49, 415953), (63, 323519), (113, 180369), (147, 138651), (339, 60123), (409, 49833), (441, 46217), (791, 25767), (1017, 20041), (1227, 16611), (2373, 8589), (2863, 7119), (3681, 5537)]