19944560

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^2\times {\mathrm{67}}^1$

素因数の和:202

約数の個数: 60

約数和(自身を含む): 47847384

約数和(自身を除く): 27902824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 67, 80, 122, 134, 244, 268, 305, 335, 488, 536, 610, 670, 976, 1072, 1220, 1340, 2440, 2680, 3721, 4087, 4880, 5360, 7442, 8174, 14884, 16348, 18605, 20435, 29768, 32696, 37210, 40870, 59536, 65392, 74420, 81740, 148840, 163480, 249307, 297680, 326960, 498614, 997228, 1246535, 1994456, 2493070, 3988912, 4986140, 9972280, 19944560]

約数ペア:

[(1, 19944560), (2, 9972280), (4, 4986140), (5, 3988912), (8, 2493070), (10, 1994456), (16, 1246535), (20, 997228), (40, 498614), (61, 326960), (67, 297680), (80, 249307), (122, 163480), (134, 148840), (244, 81740), (268, 74420), (305, 65392), (335, 59536), (488, 40870), (536, 37210), (610, 32696), (670, 29768), (976, 20435), (1072, 18605), (1220, 16348), (1340, 14884), (2440, 8174), (2680, 7442), (3721, 5360), (4087, 4880)]