20541508

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1223}}^1$

素因数の和:1276

約数の個数: 48

約数和(自身を含む): 43182720

約数和(自身を除く): 22641212

約数列:

[1, 2, 4, 13, 17, 19, 26, 34, 38, 52, 68, 76, 221, 247, 323, 442, 494, 646, 884, 988, 1223, 1292, 2446, 4199, 4892, 8398, 15899, 16796, 20791, 23237, 31798, 41582, 46474, 63596, 83164, 92948, 270283, 302081, 395029, 540566, 604162, 790058, 1081132, 1208324, 1580116, 5135377, 10270754, 20541508]

約数ペア:

[(1, 20541508), (2, 10270754), (4, 5135377), (13, 1580116), (17, 1208324), (19, 1081132), (26, 790058), (34, 604162), (38, 540566), (52, 395029), (68, 302081), (76, 270283), (221, 92948), (247, 83164), (323, 63596), (442, 46474), (494, 41582), (646, 31798), (884, 23237), (988, 20791), (1223, 16796), (1292, 15899), (2446, 8398), (4199, 4892)]