20819120

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{113}}^1$

素因数の和:187

約数の個数: 120

約数和(自身を含む): 58014144

約数和(自身を除く): 37195024

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 47, 49, 56, 70, 80, 94, 98, 112, 113, 140, 188, 196, 226, 235, 245, 280, 329, 376, 392, 452, 470, 490, 560, 565, 658, 752, 784, 791, 904, 940, 980, 1130, 1316, 1582, 1645, 1808, 1880, 1960, 2260, 2303, 2632, 3164, 3290, 3760, 3920, 3955, 4520, 4606, 5264, 5311, 5537, 6328, 6580, 7910, 9040, 9212, 10622, 11074, 11515, 12656, 13160, 15820, 18424, 21244, 22148, 23030, 26320, 26555, 27685, 31640, 36848, 37177, 42488, 44296, 46060, 53110, 55370, 63280, 74354, 84976, 88592, 92120, 106220, 110740, 148708, 184240, 185885, 212440, 221480, 260239, 297416, 371770, 424880, 442960, 520478, 594832, 743540, 1040956, 1301195, 1487080, 2081912, 2602390, 2974160, 4163824, 5204780, 10409560, 20819120]

約数ペア:

[(1, 20819120), (2, 10409560), (4, 5204780), (5, 4163824), (7, 2974160), (8, 2602390), (10, 2081912), (14, 1487080), (16, 1301195), (20, 1040956), (28, 743540), (35, 594832), (40, 520478), (47, 442960), (49, 424880), (56, 371770), (70, 297416), (80, 260239), (94, 221480), (98, 212440), (112, 185885), (113, 184240), (140, 148708), (188, 110740), (196, 106220), (226, 92120), (235, 88592), (245, 84976), (280, 74354), (329, 63280), (376, 55370), (392, 53110), (452, 46060), (470, 44296), (490, 42488), (560, 37177), (565, 36848), (658, 31640), (752, 27685), (784, 26555), (791, 26320), (904, 23030), (940, 22148), (980, 21244), (1130, 18424), (1316, 15820), (1582, 13160), (1645, 12656), (1808, 11515), (1880, 11074), (1960, 10622), (2260, 9212), (2303, 9040), (2632, 7910), (3164, 6580), (3290, 6328), (3760, 5537), (3920, 5311), (3955, 5264), (4520, 4606)]