81066640

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1\times {\mathrm{127}}^1$

素因数の和:320

約数の個数: 80

約数和(自身を含む): 194273280

約数和(自身を除く): 113206640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 101, 127, 158, 202, 254, 316, 395, 404, 505, 508, 632, 635, 790, 808, 1010, 1016, 1264, 1270, 1580, 1616, 2020, 2032, 2540, 3160, 4040, 5080, 6320, 7979, 8080, 10033, 10160, 12827, 15958, 20066, 25654, 31916, 39895, 40132, 50165, 51308, 63832, 64135, 79790, 80264, 100330, 102616, 127664, 128270, 159580, 160528, 200660, 205232, 256540, 319160, 401320, 513080, 638320, 802640, 1013333, 1026160, 2026666, 4053332, 5066665, 8106664, 10133330, 16213328, 20266660, 40533320, 81066640]

約数ペア:

[(1, 81066640), (2, 40533320), (4, 20266660), (5, 16213328), (8, 10133330), (10, 8106664), (16, 5066665), (20, 4053332), (40, 2026666), (79, 1026160), (80, 1013333), (101, 802640), (127, 638320), (158, 513080), (202, 401320), (254, 319160), (316, 256540), (395, 205232), (404, 200660), (505, 160528), (508, 159580), (632, 128270), (635, 127664), (790, 102616), (808, 100330), (1010, 80264), (1016, 79790), (1264, 64135), (1270, 63832), (1580, 51308), (1616, 50165), (2020, 40132), (2032, 39895), (2540, 31916), (3160, 25654), (4040, 20066), (5080, 15958), (6320, 12827), (7979, 10160), (8080, 10033)]