21490083

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{257}}^1$

素因数の和:448

約数の個数: 32

約数和(自身を含む): 33849600

約数和(自身を除く): 12359517

約数列:

[1, 3, 9, 19, 27, 57, 163, 171, 257, 489, 513, 771, 1467, 2313, 3097, 4401, 4883, 6939, 9291, 14649, 27873, 41891, 43947, 83619, 125673, 131841, 377019, 795929, 1131057, 2387787, 7163361, 21490083]

約数ペア:

[(1, 21490083), (3, 7163361), (9, 2387787), (19, 1131057), (27, 795929), (57, 377019), (163, 131841), (171, 125673), (257, 83619), (489, 43947), (513, 41891), (771, 27873), (1467, 14649), (2313, 9291), (3097, 6939), (4401, 4883)]