20907720

素因数分解:

$2^3\times 3^7\times 5^1\times {\mathrm{239}}^1$

素因数の和:271

約数の個数: 128

約数和(自身を含む): 70848000

約数和(自身を除く): 49940280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 81, 90, 108, 120, 135, 162, 180, 216, 239, 243, 270, 324, 360, 405, 478, 486, 540, 648, 717, 729, 810, 956, 972, 1080, 1195, 1215, 1434, 1458, 1620, 1912, 1944, 2151, 2187, 2390, 2430, 2868, 2916, 3240, 3585, 3645, 4302, 4374, 4780, 4860, 5736, 5832, 6453, 7170, 7290, 8604, 8748, 9560, 9720, 10755, 10935, 12906, 14340, 14580, 17208, 17496, 19359, 21510, 21870, 25812, 28680, 29160, 32265, 38718, 43020, 43740, 51624, 58077, 64530, 77436, 86040, 87480, 96795, 116154, 129060, 154872, 174231, 193590, 232308, 258120, 290385, 348462, 387180, 464616, 522693, 580770, 696924, 774360, 871155, 1045386, 1161540, 1393848, 1742310, 2090772, 2323080, 2613465, 3484620, 4181544, 5226930, 6969240, 10453860, 20907720]

約数ペア:

[(1, 20907720), (2, 10453860), (3, 6969240), (4, 5226930), (5, 4181544), (6, 3484620), (8, 2613465), (9, 2323080), (10, 2090772), (12, 1742310), (15, 1393848), (18, 1161540), (20, 1045386), (24, 871155), (27, 774360), (30, 696924), (36, 580770), (40, 522693), (45, 464616), (54, 387180), (60, 348462), (72, 290385), (81, 258120), (90, 232308), (108, 193590), (120, 174231), (135, 154872), (162, 129060), (180, 116154), (216, 96795), (239, 87480), (243, 86040), (270, 77436), (324, 64530), (360, 58077), (405, 51624), (478, 43740), (486, 43020), (540, 38718), (648, 32265), (717, 29160), (729, 28680), (810, 25812), (956, 21870), (972, 21510), (1080, 19359), (1195, 17496), (1215, 17208), (1434, 14580), (1458, 14340), (1620, 12906), (1912, 10935), (1944, 10755), (2151, 9720), (2187, 9560), (2390, 8748), (2430, 8604), (2868, 7290), (2916, 7170), (3240, 6453), (3585, 5832), (3645, 5736), (4302, 4860), (4374, 4780)]