20638592

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:263

約数の個数: 64

約数和(自身を含む): 45124800

約数和(自身を除く): 24486208

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 79, 104, 128, 157, 158, 208, 314, 316, 416, 628, 632, 832, 1027, 1256, 1264, 1664, 2041, 2054, 2512, 2528, 4082, 4108, 5024, 5056, 8164, 8216, 10048, 10112, 12403, 16328, 16432, 20096, 24806, 32656, 32864, 49612, 65312, 65728, 99224, 130624, 131456, 161239, 198448, 261248, 322478, 396896, 644956, 793792, 1289912, 1587584, 2579824, 5159648, 10319296, 20638592]

約数ペア:

[(1, 20638592), (2, 10319296), (4, 5159648), (8, 2579824), (13, 1587584), (16, 1289912), (26, 793792), (32, 644956), (52, 396896), (64, 322478), (79, 261248), (104, 198448), (128, 161239), (157, 131456), (158, 130624), (208, 99224), (314, 65728), (316, 65312), (416, 49612), (628, 32864), (632, 32656), (832, 24806), (1027, 20096), (1256, 16432), (1264, 16328), (1664, 12403), (2041, 10112), (2054, 10048), (2512, 8216), (2528, 8164), (4082, 5056), (4108, 5024)]