21782440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{311}}^1$

素因数の和:442

約数の個数: 64

約数和(自身を含む): 52565760

約数和(自身を除く): 30783320

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 103, 136, 170, 206, 311, 340, 412, 515, 622, 680, 824, 1030, 1244, 1555, 1751, 2060, 2488, 3110, 3502, 4120, 5287, 6220, 7004, 8755, 10574, 12440, 14008, 17510, 21148, 26435, 32033, 35020, 42296, 52870, 64066, 70040, 105740, 128132, 160165, 211480, 256264, 320330, 544561, 640660, 1089122, 1281320, 2178244, 2722805, 4356488, 5445610, 10891220, 21782440]

約数ペア:

[(1, 21782440), (2, 10891220), (4, 5445610), (5, 4356488), (8, 2722805), (10, 2178244), (17, 1281320), (20, 1089122), (34, 640660), (40, 544561), (68, 320330), (85, 256264), (103, 211480), (136, 160165), (170, 128132), (206, 105740), (311, 70040), (340, 64066), (412, 52870), (515, 42296), (622, 35020), (680, 32033), (824, 26435), (1030, 21148), (1244, 17510), (1555, 14008), (1751, 12440), (2060, 10574), (2488, 8755), (3110, 7004), (3502, 6220), (4120, 5287)]