20009974540

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{241}}^1\times {\mathrm{25469}}^1$

素因数の和:25882

約数の個数: 48

約数和(自身を含む): 42455841120

約数和(自身を除く): 22445866580

約数列:

[1, 2, 4, 5, 10, 20, 163, 241, 326, 482, 652, 815, 964, 1205, 1630, 2410, 3260, 4820, 25469, 39283, 50938, 78566, 101876, 127345, 157132, 196415, 254690, 392830, 509380, 785660, 4151447, 6138029, 8302894, 12276058, 16605788, 20757235, 24552116, 30690145, 41514470, 61380290, 83028940, 122760580, 1000498727, 2000997454, 4001994908, 5002493635, 10004987270, 20009974540]

約数ペア:

[(1, 20009974540), (2, 10004987270), (4, 5002493635), (5, 4001994908), (10, 2000997454), (20, 1000498727), (163, 122760580), (241, 83028940), (326, 61380290), (482, 41514470), (652, 30690145), (815, 24552116), (964, 20757235), (1205, 16605788), (1630, 12276058), (2410, 8302894), (3260, 6138029), (4820, 4151447), (25469, 785660), (39283, 509380), (50938, 392830), (78566, 254690), (101876, 196415), (127345, 157132)]