20778308

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 39664128

約数和(自身を除く): 18885820

約数列:

[1, 2, 4, 31, 41, 61, 62, 67, 82, 122, 124, 134, 164, 244, 268, 1271, 1891, 2077, 2501, 2542, 2747, 3782, 4087, 4154, 5002, 5084, 5494, 7564, 8174, 8308, 10004, 10988, 16348, 77531, 85157, 126697, 155062, 167567, 170314, 253394, 310124, 335134, 340628, 506788, 670268, 5194577, 10389154, 20778308]

約数ペア:

[(1, 20778308), (2, 10389154), (4, 5194577), (31, 670268), (41, 506788), (61, 340628), (62, 335134), (67, 310124), (82, 253394), (122, 170314), (124, 167567), (134, 155062), (164, 126697), (244, 85157), (268, 77531), (1271, 16348), (1891, 10988), (2077, 10004), (2501, 8308), (2542, 8174), (2747, 7564), (3782, 5494), (4087, 5084), (4154, 5002)]