20646808

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{359}}^1$

素因数の和:464

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 27737192

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 79, 91, 104, 158, 182, 316, 359, 364, 553, 632, 718, 728, 1027, 1106, 1436, 2054, 2212, 2513, 2872, 4108, 4424, 4667, 5026, 7189, 8216, 9334, 10052, 14378, 18668, 20104, 28361, 28756, 32669, 37336, 56722, 57512, 65338, 113444, 130676, 198527, 226888, 261352, 368693, 397054, 737386, 794108, 1474772, 1588216, 2580851, 2949544, 5161702, 10323404, 20646808]

約数ペア:

[(1, 20646808), (2, 10323404), (4, 5161702), (7, 2949544), (8, 2580851), (13, 1588216), (14, 1474772), (26, 794108), (28, 737386), (52, 397054), (56, 368693), (79, 261352), (91, 226888), (104, 198527), (158, 130676), (182, 113444), (316, 65338), (359, 57512), (364, 56722), (553, 37336), (632, 32669), (718, 28756), (728, 28361), (1027, 20104), (1106, 18668), (1436, 14378), (2054, 10052), (2212, 9334), (2513, 8216), (2872, 7189), (4108, 5026), (4424, 4667)]