19980821480

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{227}}^1\times {\mathrm{129443}}^1$

素因数の和:129698

約数の個数: 64

約数和(自身を含む): 47811435840

約数和(自身を除く): 27830614360

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 227, 340, 454, 680, 908, 1135, 1816, 2270, 3859, 4540, 7718, 9080, 15436, 19295, 30872, 38590, 77180, 129443, 154360, 258886, 517772, 647215, 1035544, 1294430, 2200531, 2588860, 4401062, 5177720, 8802124, 11002655, 17604248, 22005310, 29383561, 44010620, 58767122, 88021240, 117534244, 146917805, 235068488, 293835610, 499520537, 587671220, 999041074, 1175342440, 1998082148, 2497602685, 3996164296, 4995205370, 9990410740, 19980821480]

約数ペア:

[(1, 19980821480), (2, 9990410740), (4, 4995205370), (5, 3996164296), (8, 2497602685), (10, 1998082148), (17, 1175342440), (20, 999041074), (34, 587671220), (40, 499520537), (68, 293835610), (85, 235068488), (136, 146917805), (170, 117534244), (227, 88021240), (340, 58767122), (454, 44010620), (680, 29383561), (908, 22005310), (1135, 17604248), (1816, 11002655), (2270, 8802124), (3859, 5177720), (4540, 4401062), (7718, 2588860), (9080, 2200531), (15436, 1294430), (19295, 1035544), (30872, 647215), (38590, 517772), (77180, 258886), (129443, 154360)]