19811556

素因数分解:

$2^2\times 3^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{337}}^1$

素因数の和:441

約数の個数: 72

約数和(自身を含む): 53149824

約数和(自身を除く): 33338268

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 71, 92, 138, 142, 207, 213, 276, 284, 337, 414, 426, 639, 674, 828, 852, 1011, 1278, 1348, 1633, 2022, 2556, 3033, 3266, 4044, 4899, 6066, 6532, 7751, 9798, 12132, 14697, 15502, 19596, 23253, 23927, 29394, 31004, 46506, 47854, 58788, 69759, 71781, 93012, 95708, 139518, 143562, 215343, 279036, 287124, 430686, 550321, 861372, 1100642, 1650963, 2201284, 3301926, 4952889, 6603852, 9905778, 19811556]

約数ペア:

[(1, 19811556), (2, 9905778), (3, 6603852), (4, 4952889), (6, 3301926), (9, 2201284), (12, 1650963), (18, 1100642), (23, 861372), (36, 550321), (46, 430686), (69, 287124), (71, 279036), (92, 215343), (138, 143562), (142, 139518), (207, 95708), (213, 93012), (276, 71781), (284, 69759), (337, 58788), (414, 47854), (426, 46506), (639, 31004), (674, 29394), (828, 23927), (852, 23253), (1011, 19596), (1278, 15502), (1348, 14697), (1633, 12132), (2022, 9798), (2556, 7751), (3033, 6532), (3266, 6066), (4044, 4899)]