128439680

素因数分解:

$2^7\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1987}}^1$

素因数の和:2107

約数の個数: 64

約数和(自身を含む): 310247280

約数和(自身を除く): 181807600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 128, 160, 202, 320, 404, 505, 640, 808, 1010, 1616, 1987, 2020, 3232, 3974, 4040, 6464, 7948, 8080, 9935, 12928, 15896, 16160, 19870, 31792, 32320, 39740, 63584, 64640, 79480, 127168, 158960, 200687, 254336, 317920, 401374, 635840, 802748, 1003435, 1271680, 1605496, 2006870, 3210992, 4013740, 6421984, 8027480, 12843968, 16054960, 25687936, 32109920, 64219840, 128439680]

約数ペア:

[(1, 128439680), (2, 64219840), (4, 32109920), (5, 25687936), (8, 16054960), (10, 12843968), (16, 8027480), (20, 6421984), (32, 4013740), (40, 3210992), (64, 2006870), (80, 1605496), (101, 1271680), (128, 1003435), (160, 802748), (202, 635840), (320, 401374), (404, 317920), (505, 254336), (640, 200687), (808, 158960), (1010, 127168), (1616, 79480), (1987, 64640), (2020, 63584), (3232, 39740), (3974, 32320), (4040, 31792), (6464, 19870), (7948, 16160), (8080, 15896), (9935, 12928)]