18221920

素因数分解:

$2^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1867}}^1$

素因数の和:1943

約数の個数: 48

約数和(自身を含む): 43778448

約数和(自身を除く): 25556528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 80, 122, 160, 244, 305, 488, 610, 976, 1220, 1867, 1952, 2440, 3734, 4880, 7468, 9335, 9760, 14936, 18670, 29872, 37340, 59744, 74680, 113887, 149360, 227774, 298720, 455548, 569435, 911096, 1138870, 1822192, 2277740, 3644384, 4555480, 9110960, 18221920]

約数ペア:

[(1, 18221920), (2, 9110960), (4, 4555480), (5, 3644384), (8, 2277740), (10, 1822192), (16, 1138870), (20, 911096), (32, 569435), (40, 455548), (61, 298720), (80, 227774), (122, 149360), (160, 113887), (244, 74680), (305, 59744), (488, 37340), (610, 29872), (976, 18670), (1220, 14936), (1867, 9760), (1952, 9335), (2440, 7468), (3734, 4880)]