20561116

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{491}}^1$

素因数の和:562

約数の個数: 36

約数和(自身を含む): 39364920

約数和(自身を除く): 18803804

約数列:

[1, 2, 4, 19, 29, 38, 58, 76, 116, 361, 491, 551, 722, 982, 1102, 1444, 1964, 2204, 9329, 10469, 14239, 18658, 20938, 28478, 37316, 41876, 56956, 177251, 270541, 354502, 541082, 709004, 1082164, 5140279, 10280558, 20561116]

約数ペア:

[(1, 20561116), (2, 10280558), (4, 5140279), (19, 1082164), (29, 709004), (38, 541082), (58, 354502), (76, 270541), (116, 177251), (361, 56956), (491, 41876), (551, 37316), (722, 28478), (982, 20938), (1102, 18658), (1444, 14239), (1964, 10469), (2204, 9329)]