19978812

素因数分解:

$2^2\times 3^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{383}}^1$

素因数の和:429

約数の個数: 120

約数和(自身を含む): 62447616

約数和(自身を除く): 42468804

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 23, 27, 28, 36, 42, 46, 54, 63, 69, 81, 84, 92, 108, 126, 138, 161, 162, 189, 207, 252, 276, 322, 324, 378, 383, 414, 483, 567, 621, 644, 756, 766, 828, 966, 1134, 1149, 1242, 1449, 1532, 1863, 1932, 2268, 2298, 2484, 2681, 2898, 3447, 3726, 4347, 4596, 5362, 5796, 6894, 7452, 8043, 8694, 8809, 10341, 10724, 13041, 13788, 16086, 17388, 17618, 20682, 24129, 26082, 26427, 31023, 32172, 35236, 41364, 48258, 52164, 52854, 61663, 62046, 72387, 79281, 96516, 105708, 123326, 124092, 144774, 158562, 184989, 217161, 237843, 246652, 289548, 317124, 369978, 434322, 475686, 554967, 713529, 739956, 868644, 951372, 1109934, 1427058, 1664901, 2219868, 2854116, 3329802, 4994703, 6659604, 9989406, 19978812]

約数ペア:

[(1, 19978812), (2, 9989406), (3, 6659604), (4, 4994703), (6, 3329802), (7, 2854116), (9, 2219868), (12, 1664901), (14, 1427058), (18, 1109934), (21, 951372), (23, 868644), (27, 739956), (28, 713529), (36, 554967), (42, 475686), (46, 434322), (54, 369978), (63, 317124), (69, 289548), (81, 246652), (84, 237843), (92, 217161), (108, 184989), (126, 158562), (138, 144774), (161, 124092), (162, 123326), (189, 105708), (207, 96516), (252, 79281), (276, 72387), (322, 62046), (324, 61663), (378, 52854), (383, 52164), (414, 48258), (483, 41364), (567, 35236), (621, 32172), (644, 31023), (756, 26427), (766, 26082), (828, 24129), (966, 20682), (1134, 17618), (1149, 17388), (1242, 16086), (1449, 13788), (1532, 13041), (1863, 10724), (1932, 10341), (2268, 8809), (2298, 8694), (2484, 8043), (2681, 7452), (2898, 6894), (3447, 5796), (3726, 5362), (4347, 4596)]