20003907

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 34473600

約数和(自身を除く): 14469693

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 89, 139, 147, 231, 267, 417, 539, 623, 973, 979, 1529, 1617, 1869, 2919, 2937, 4361, 4587, 6811, 6853, 10703, 12371, 13083, 20433, 20559, 32109, 37113, 47971, 74921, 86597, 136081, 143913, 224763, 259791, 408243, 606179, 952567, 1818537, 2857701, 6667969, 20003907]

約数ペア:

[(1, 20003907), (3, 6667969), (7, 2857701), (11, 1818537), (21, 952567), (33, 606179), (49, 408243), (77, 259791), (89, 224763), (139, 143913), (147, 136081), (231, 86597), (267, 74921), (417, 47971), (539, 37113), (623, 32109), (973, 20559), (979, 20433), (1529, 13083), (1617, 12371), (1869, 10703), (2919, 6853), (2937, 6811), (4361, 4587)]