21248913

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{83}}^1\times {\mathrm{167}}^1$

素因数の和:333

約数の個数: 32

約数和(自身を含む): 33417216

約数和(自身を除く): 12168303

約数列:

[1, 3, 7, 21, 73, 83, 167, 219, 249, 501, 511, 581, 1169, 1533, 1743, 3507, 6059, 12191, 13861, 18177, 36573, 41583, 42413, 85337, 97027, 127239, 256011, 291081, 1011853, 3035559, 7082971, 21248913]

約数ペア:

[(1, 21248913), (3, 7082971), (7, 3035559), (21, 1011853), (73, 291081), (83, 256011), (167, 127239), (219, 97027), (249, 85337), (501, 42413), (511, 41583), (581, 36573), (1169, 18177), (1533, 13861), (1743, 12191), (3507, 6059)]