21857360

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1697}}^1$

素因数の和:1740

約数の個数: 80

約数和(自身を含む): 60638976

約数和(自身を除く): 38781616

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1697, 1840, 2576, 3220, 3394, 6440, 6788, 8485, 11879, 12880, 13576, 16970, 23758, 27152, 33940, 39031, 47516, 59395, 67880, 78062, 95032, 118790, 135760, 156124, 190064, 195155, 237580, 273217, 312248, 390310, 475160, 546434, 624496, 780620, 950320, 1092868, 1366085, 1561240, 2185736, 2732170, 3122480, 4371472, 5464340, 10928680, 21857360]

約数ペア:

[(1, 21857360), (2, 10928680), (4, 5464340), (5, 4371472), (7, 3122480), (8, 2732170), (10, 2185736), (14, 1561240), (16, 1366085), (20, 1092868), (23, 950320), (28, 780620), (35, 624496), (40, 546434), (46, 475160), (56, 390310), (70, 312248), (80, 273217), (92, 237580), (112, 195155), (115, 190064), (140, 156124), (161, 135760), (184, 118790), (230, 95032), (280, 78062), (322, 67880), (368, 59395), (460, 47516), (560, 39031), (644, 33940), (805, 27152), (920, 23758), (1288, 16970), (1610, 13576), (1697, 12880), (1840, 11879), (2576, 8485), (3220, 6788), (3394, 6440)]