21549880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:149

約数の個数: 128

約数和(自身を含む): 58164480

約数和(自身を除く): 36614600

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 43, 44, 55, 67, 68, 85, 86, 88, 110, 134, 136, 170, 172, 187, 215, 220, 268, 335, 340, 344, 374, 430, 440, 473, 536, 670, 680, 731, 737, 748, 860, 935, 946, 1139, 1340, 1462, 1474, 1496, 1720, 1870, 1892, 2278, 2365, 2680, 2881, 2924, 2948, 3655, 3685, 3740, 3784, 4556, 4730, 5695, 5762, 5848, 5896, 7310, 7370, 7480, 8041, 9112, 9460, 11390, 11524, 12529, 14405, 14620, 14740, 16082, 18920, 22780, 23048, 25058, 28810, 29240, 29480, 31691, 32164, 40205, 45560, 48977, 50116, 57620, 62645, 63382, 64328, 80410, 97954, 100232, 115240, 125290, 126764, 158455, 160820, 195908, 244885, 250580, 253528, 316910, 321640, 391816, 489770, 501160, 538747, 633820, 979540, 1077494, 1267640, 1959080, 2154988, 2693735, 4309976, 5387470, 10774940, 21549880]

約数ペア:

[(1, 21549880), (2, 10774940), (4, 5387470), (5, 4309976), (8, 2693735), (10, 2154988), (11, 1959080), (17, 1267640), (20, 1077494), (22, 979540), (34, 633820), (40, 538747), (43, 501160), (44, 489770), (55, 391816), (67, 321640), (68, 316910), (85, 253528), (86, 250580), (88, 244885), (110, 195908), (134, 160820), (136, 158455), (170, 126764), (172, 125290), (187, 115240), (215, 100232), (220, 97954), (268, 80410), (335, 64328), (340, 63382), (344, 62645), (374, 57620), (430, 50116), (440, 48977), (473, 45560), (536, 40205), (670, 32164), (680, 31691), (731, 29480), (737, 29240), (748, 28810), (860, 25058), (935, 23048), (946, 22780), (1139, 18920), (1340, 16082), (1462, 14740), (1474, 14620), (1496, 14405), (1720, 12529), (1870, 11524), (1892, 11390), (2278, 9460), (2365, 9112), (2680, 8041), (2881, 7480), (2924, 7370), (2948, 7310), (3655, 5896), (3685, 5848), (3740, 5762), (3784, 5695), (4556, 4730)]