21720819

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{6247}}^1$

素因数の和:6330

約数の個数: 16

約数和(自身を含む): 30990080

約数和(自身を除く): 9269261

約数列:

[1, 3, 19, 57, 61, 183, 1159, 3477, 6247, 18741, 118693, 356079, 381067, 1143201, 7240273, 21720819]

約数ペア:

[(1, 21720819), (3, 7240273), (19, 1143201), (57, 381067), (61, 356079), (183, 118693), (1159, 18741), (3477, 6247)]