20474720

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{181}}^1$

素因数の和:304

約数の個数: 96

約数和(自身を含む): 56137536

約数和(自身を除く): 35662816

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 101, 112, 140, 160, 181, 202, 224, 280, 362, 404, 505, 560, 707, 724, 808, 905, 1010, 1120, 1267, 1414, 1448, 1616, 1810, 2020, 2534, 2828, 2896, 3232, 3535, 3620, 4040, 5068, 5656, 5792, 6335, 7070, 7240, 8080, 10136, 11312, 12670, 14140, 14480, 16160, 18281, 20272, 22624, 25340, 28280, 28960, 36562, 40544, 50680, 56560, 73124, 91405, 101360, 113120, 127967, 146248, 182810, 202720, 255934, 292496, 365620, 511868, 584992, 639835, 731240, 1023736, 1279670, 1462480, 2047472, 2559340, 2924960, 4094944, 5118680, 10237360, 20474720]

約数ペア:

[(1, 20474720), (2, 10237360), (4, 5118680), (5, 4094944), (7, 2924960), (8, 2559340), (10, 2047472), (14, 1462480), (16, 1279670), (20, 1023736), (28, 731240), (32, 639835), (35, 584992), (40, 511868), (56, 365620), (70, 292496), (80, 255934), (101, 202720), (112, 182810), (140, 146248), (160, 127967), (181, 113120), (202, 101360), (224, 91405), (280, 73124), (362, 56560), (404, 50680), (505, 40544), (560, 36562), (707, 28960), (724, 28280), (808, 25340), (905, 22624), (1010, 20272), (1120, 18281), (1267, 16160), (1414, 14480), (1448, 14140), (1616, 12670), (1810, 11312), (2020, 10136), (2534, 8080), (2828, 7240), (2896, 7070), (3232, 6335), (3535, 5792), (3620, 5656), (4040, 5068)]