20791840

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4481}}^1$

素因数の和:4525

約数の個数: 48

約数和(自身を含む): 50825880

約数和(自身を除く): 30034040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 160, 232, 290, 464, 580, 928, 1160, 2320, 4481, 4640, 8962, 17924, 22405, 35848, 44810, 71696, 89620, 129949, 143392, 179240, 259898, 358480, 519796, 649745, 716960, 1039592, 1299490, 2079184, 2598980, 4158368, 5197960, 10395920, 20791840]

約数ペア:

[(1, 20791840), (2, 10395920), (4, 5197960), (5, 4158368), (8, 2598980), (10, 2079184), (16, 1299490), (20, 1039592), (29, 716960), (32, 649745), (40, 519796), (58, 358480), (80, 259898), (116, 179240), (145, 143392), (160, 129949), (232, 89620), (290, 71696), (464, 44810), (580, 35848), (928, 22405), (1160, 17924), (2320, 8962), (4481, 4640)]