19815680

素因数分解:

$2^8\times 5^1\times {\mathrm{113}}^1\times {\mathrm{137}}^1$

素因数の和:271

約数の個数: 72

約数和(自身を含む): 48234312

約数和(自身を除く): 28418632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 113, 128, 137, 160, 226, 256, 274, 320, 452, 548, 565, 640, 685, 904, 1096, 1130, 1280, 1370, 1808, 2192, 2260, 2740, 3616, 4384, 4520, 5480, 7232, 8768, 9040, 10960, 14464, 15481, 17536, 18080, 21920, 28928, 30962, 35072, 36160, 43840, 61924, 72320, 77405, 87680, 123848, 144640, 154810, 175360, 247696, 309620, 495392, 619240, 990784, 1238480, 1981568, 2476960, 3963136, 4953920, 9907840, 19815680]

約数ペア:

[(1, 19815680), (2, 9907840), (4, 4953920), (5, 3963136), (8, 2476960), (10, 1981568), (16, 1238480), (20, 990784), (32, 619240), (40, 495392), (64, 309620), (80, 247696), (113, 175360), (128, 154810), (137, 144640), (160, 123848), (226, 87680), (256, 77405), (274, 72320), (320, 61924), (452, 43840), (548, 36160), (565, 35072), (640, 30962), (685, 28928), (904, 21920), (1096, 18080), (1130, 17536), (1280, 15481), (1370, 14464), (1808, 10960), (2192, 9040), (2260, 8768), (2740, 7232), (3616, 5480), (4384, 4520)]