21393531

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{367}}^1$

素因数の和:520

約数の個数: 32

約数和(自身を含む): 33914880

約数和(自身を除く): 12521349

約数列:

[1, 3, 9, 17, 27, 51, 127, 153, 367, 381, 459, 1101, 1143, 2159, 3303, 3429, 6239, 6477, 9909, 18717, 19431, 46609, 56151, 58293, 139827, 168453, 419481, 792353, 1258443, 2377059, 7131177, 21393531]

約数ペア:

[(1, 21393531), (3, 7131177), (9, 2377059), (17, 1258443), (27, 792353), (51, 419481), (127, 168453), (153, 139827), (367, 58293), (381, 56151), (459, 46609), (1101, 19431), (1143, 18717), (2159, 9909), (3303, 6477), (3429, 6239)]