19707760

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{337}}^1$

素因数の和:410

約数の個数: 80

約数和(自身を含む): 49791456

約数和(自身を除く): 30083696

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 43, 68, 80, 85, 86, 136, 170, 172, 215, 272, 337, 340, 344, 430, 674, 680, 688, 731, 860, 1348, 1360, 1462, 1685, 1720, 2696, 2924, 3370, 3440, 3655, 5392, 5729, 5848, 6740, 7310, 11458, 11696, 13480, 14491, 14620, 22916, 26960, 28645, 28982, 29240, 45832, 57290, 57964, 58480, 72455, 91664, 114580, 115928, 144910, 229160, 231856, 246347, 289820, 458320, 492694, 579640, 985388, 1159280, 1231735, 1970776, 2463470, 3941552, 4926940, 9853880, 19707760]

約数ペア:

[(1, 19707760), (2, 9853880), (4, 4926940), (5, 3941552), (8, 2463470), (10, 1970776), (16, 1231735), (17, 1159280), (20, 985388), (34, 579640), (40, 492694), (43, 458320), (68, 289820), (80, 246347), (85, 231856), (86, 229160), (136, 144910), (170, 115928), (172, 114580), (215, 91664), (272, 72455), (337, 58480), (340, 57964), (344, 57290), (430, 45832), (674, 29240), (680, 28982), (688, 28645), (731, 26960), (860, 22916), (1348, 14620), (1360, 14491), (1462, 13480), (1685, 11696), (1720, 11458), (2696, 7310), (2924, 6740), (3370, 5848), (3440, 5729), (3655, 5392)]