20426240

素因数分解:

$2^9\times 5^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:203

約数の個数: 80

約数和(自身を含む): 50086080

約数和(自身を除く): 29659840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 101, 128, 158, 160, 202, 256, 316, 320, 395, 404, 505, 512, 632, 640, 790, 808, 1010, 1264, 1280, 1580, 1616, 2020, 2528, 2560, 3160, 3232, 4040, 5056, 6320, 6464, 7979, 8080, 10112, 12640, 12928, 15958, 16160, 20224, 25280, 25856, 31916, 32320, 39895, 40448, 50560, 51712, 63832, 64640, 79790, 101120, 127664, 129280, 159580, 202240, 255328, 258560, 319160, 510656, 638320, 1021312, 1276640, 2042624, 2553280, 4085248, 5106560, 10213120, 20426240]

約数ペア:

[(1, 20426240), (2, 10213120), (4, 5106560), (5, 4085248), (8, 2553280), (10, 2042624), (16, 1276640), (20, 1021312), (32, 638320), (40, 510656), (64, 319160), (79, 258560), (80, 255328), (101, 202240), (128, 159580), (158, 129280), (160, 127664), (202, 101120), (256, 79790), (316, 64640), (320, 63832), (395, 51712), (404, 50560), (505, 40448), (512, 39895), (632, 32320), (640, 31916), (790, 25856), (808, 25280), (1010, 20224), (1264, 16160), (1280, 15958), (1580, 12928), (1616, 12640), (2020, 10112), (2528, 8080), (2560, 7979), (3160, 6464), (3232, 6320), (4040, 5056)]