21557643

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{37}}^2\times {\mathrm{181}}^1$

素因数の和:287

約数の個数: 24

約数和(自身を含む): 30728880

約数和(自身を除く): 9171237

約数列:

[1, 3, 29, 37, 87, 111, 181, 543, 1073, 1369, 3219, 4107, 5249, 6697, 15747, 20091, 39701, 119103, 194213, 247789, 582639, 743367, 7185881, 21557643]

約数ペア:

[(1, 21557643), (3, 7185881), (29, 743367), (37, 582639), (87, 247789), (111, 194213), (181, 119103), (543, 39701), (1073, 20091), (1369, 15747), (3219, 6697), (4107, 5249)]