18780080

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21341}}^1$

素因数の和:21365

約数の個数: 40

約数和(自身を含む): 47635344

約数和(自身を除く): 28855264

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 21341, 42682, 85364, 106705, 170728, 213410, 234751, 341456, 426820, 469502, 853640, 939004, 1173755, 1707280, 1878008, 2347510, 3756016, 4695020, 9390040, 18780080]

約数ペア:

[(1, 18780080), (2, 9390040), (4, 4695020), (5, 3756016), (8, 2347510), (10, 1878008), (11, 1707280), (16, 1173755), (20, 939004), (22, 853640), (40, 469502), (44, 426820), (55, 341456), (80, 234751), (88, 213410), (110, 170728), (176, 106705), (220, 85364), (440, 42682), (880, 21341)]