20123781391

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{2539}}^1\times {\mathrm{2591}}^1$

素因数の和:5179

約数の個数: 32

約数和(自身を含む): 25281331200

約数和(自身を除く): 5157549809

約数列:

[1, 7, 19, 23, 133, 161, 437, 2539, 2591, 3059, 17773, 18137, 48241, 49229, 58397, 59593, 337687, 344603, 408779, 417151, 1109543, 1132267, 6578549, 7766801, 7925869, 46049843, 124992431, 151306627, 874947017, 1059146389, 2874825913, 20123781391]

約数ペア:

[(1, 20123781391), (7, 2874825913), (19, 1059146389), (23, 874947017), (133, 151306627), (161, 124992431), (437, 46049843), (2539, 7925869), (2591, 7766801), (3059, 6578549), (17773, 1132267), (18137, 1109543), (48241, 417151), (49229, 408779), (58397, 344603), (59593, 337687)]