155520980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1\times {\mathrm{383}}^1$

素因数の和:728

約数の個数: 48

約数和(自身を含む): 332881920

約数和(自身を除く): 177360940

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 257, 316, 383, 395, 514, 766, 790, 1028, 1285, 1532, 1580, 1915, 2570, 3830, 5140, 7660, 20303, 30257, 40606, 60514, 81212, 98431, 101515, 121028, 151285, 196862, 203030, 302570, 393724, 406060, 492155, 605140, 984310, 1968620, 7776049, 15552098, 31104196, 38880245, 77760490, 155520980]

約数ペア:

[(1, 155520980), (2, 77760490), (4, 38880245), (5, 31104196), (10, 15552098), (20, 7776049), (79, 1968620), (158, 984310), (257, 605140), (316, 492155), (383, 406060), (395, 393724), (514, 302570), (766, 203030), (790, 196862), (1028, 151285), (1285, 121028), (1532, 101515), (1580, 98431), (1915, 81212), (2570, 60514), (3830, 40606), (5140, 30257), (7660, 20303)]