20081920

素因数分解:

$2^8\times 5^1\times {\mathrm{29}}^1\times {\mathrm{541}}^1$

素因数の和:591

約数の個数: 72

約数和(自身を含む): 49853160

約数和(自身を除く): 29771240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145, 160, 232, 256, 290, 320, 464, 541, 580, 640, 928, 1082, 1160, 1280, 1856, 2164, 2320, 2705, 3712, 4328, 4640, 5410, 7424, 8656, 9280, 10820, 15689, 17312, 18560, 21640, 31378, 34624, 37120, 43280, 62756, 69248, 78445, 86560, 125512, 138496, 156890, 173120, 251024, 313780, 346240, 502048, 627560, 692480, 1004096, 1255120, 2008192, 2510240, 4016384, 5020480, 10040960, 20081920]

約数ペア:

[(1, 20081920), (2, 10040960), (4, 5020480), (5, 4016384), (8, 2510240), (10, 2008192), (16, 1255120), (20, 1004096), (29, 692480), (32, 627560), (40, 502048), (58, 346240), (64, 313780), (80, 251024), (116, 173120), (128, 156890), (145, 138496), (160, 125512), (232, 86560), (256, 78445), (290, 69248), (320, 62756), (464, 43280), (541, 37120), (580, 34624), (640, 31378), (928, 21640), (1082, 18560), (1160, 17312), (1280, 15689), (1856, 10820), (2164, 9280), (2320, 8656), (2705, 7424), (3712, 5410), (4328, 4640)]