20195980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{797}}^1$

素因数の和:994

約数の個数: 48

約数和(自身を含む): 48799296

約数和(自身を除く): 28603316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 181, 362, 724, 797, 905, 1267, 1594, 1810, 2534, 3188, 3620, 3985, 5068, 5579, 6335, 7970, 11158, 12670, 15940, 22316, 25340, 27895, 55790, 111580, 144257, 288514, 577028, 721285, 1009799, 1442570, 2019598, 2885140, 4039196, 5048995, 10097990, 20195980]

約数ペア:

[(1, 20195980), (2, 10097990), (4, 5048995), (5, 4039196), (7, 2885140), (10, 2019598), (14, 1442570), (20, 1009799), (28, 721285), (35, 577028), (70, 288514), (140, 144257), (181, 111580), (362, 55790), (724, 27895), (797, 25340), (905, 22316), (1267, 15940), (1594, 12670), (1810, 11158), (2534, 7970), (3188, 6335), (3620, 5579), (3985, 5068)]