19943680

素因数分解:

$2^8\times 5^1\times {\mathrm{15581}}^1$

素因数の和:15602

約数の個数: 36

約数和(自身を含む): 47774412

約数和(自身を除く): 27830732

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15581, 31162, 62324, 77905, 124648, 155810, 249296, 311620, 498592, 623240, 997184, 1246480, 1994368, 2492960, 3988736, 4985920, 9971840, 19943680]

約数ペア:

[(1, 19943680), (2, 9971840), (4, 4985920), (5, 3988736), (8, 2492960), (10, 1994368), (16, 1246480), (20, 997184), (32, 623240), (40, 498592), (64, 311620), (80, 249296), (128, 155810), (160, 124648), (256, 77905), (320, 62324), (640, 31162), (1280, 15581)]