21311880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{337}}^1$

素因数の和:399

約数の個数: 128

約数和(自身を含む): 70087680

約数和(自身を除く): 48775800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 31, 34, 40, 51, 60, 62, 68, 85, 93, 102, 120, 124, 136, 155, 170, 186, 204, 248, 255, 310, 337, 340, 372, 408, 465, 510, 527, 620, 674, 680, 744, 930, 1011, 1020, 1054, 1240, 1348, 1581, 1685, 1860, 2022, 2040, 2108, 2635, 2696, 3162, 3370, 3720, 4044, 4216, 5055, 5270, 5729, 6324, 6740, 7905, 8088, 10110, 10447, 10540, 11458, 12648, 13480, 15810, 17187, 20220, 20894, 21080, 22916, 28645, 31341, 31620, 34374, 40440, 41788, 45832, 52235, 57290, 62682, 63240, 68748, 83576, 85935, 104470, 114580, 125364, 137496, 156705, 171870, 177599, 208940, 229160, 250728, 313410, 343740, 355198, 417880, 532797, 626820, 687480, 710396, 887995, 1065594, 1253640, 1420792, 1775990, 2131188, 2663985, 3551980, 4262376, 5327970, 7103960, 10655940, 21311880]

約数ペア:

[(1, 21311880), (2, 10655940), (3, 7103960), (4, 5327970), (5, 4262376), (6, 3551980), (8, 2663985), (10, 2131188), (12, 1775990), (15, 1420792), (17, 1253640), (20, 1065594), (24, 887995), (30, 710396), (31, 687480), (34, 626820), (40, 532797), (51, 417880), (60, 355198), (62, 343740), (68, 313410), (85, 250728), (93, 229160), (102, 208940), (120, 177599), (124, 171870), (136, 156705), (155, 137496), (170, 125364), (186, 114580), (204, 104470), (248, 85935), (255, 83576), (310, 68748), (337, 63240), (340, 62682), (372, 57290), (408, 52235), (465, 45832), (510, 41788), (527, 40440), (620, 34374), (674, 31620), (680, 31341), (744, 28645), (930, 22916), (1011, 21080), (1020, 20894), (1054, 20220), (1240, 17187), (1348, 15810), (1581, 13480), (1685, 12648), (1860, 11458), (2022, 10540), (2040, 10447), (2108, 10110), (2635, 8088), (2696, 7905), (3162, 6740), (3370, 6324), (3720, 5729), (4044, 5270), (4216, 5055)]