20755880

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^2\times {\mathrm{617}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 48445020

約数和(自身を除く): 27689140

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 617, 841, 1160, 1234, 1682, 2468, 3085, 3364, 4205, 4936, 6170, 6728, 8410, 12340, 16820, 17893, 24680, 33640, 35786, 71572, 89465, 143144, 178930, 357860, 518897, 715720, 1037794, 2075588, 2594485, 4151176, 5188970, 10377940, 20755880]

約数ペア:

[(1, 20755880), (2, 10377940), (4, 5188970), (5, 4151176), (8, 2594485), (10, 2075588), (20, 1037794), (29, 715720), (40, 518897), (58, 357860), (116, 178930), (145, 143144), (232, 89465), (290, 71572), (580, 35786), (617, 33640), (841, 24680), (1160, 17893), (1234, 16820), (1682, 12340), (2468, 8410), (3085, 6728), (3364, 6170), (4205, 4936)]