20280771

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{16943}}^1$

素因数の和:16975

約数の個数: 24

約数和(自身を含む): 35243520

約数和(自身を除く): 14962749

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 16943, 50829, 118601, 152487, 321917, 355803, 965751, 1067409, 2253419, 2897253, 6760257, 20280771]

約数ペア:

[(1, 20280771), (3, 6760257), (7, 2897253), (9, 2253419), (19, 1067409), (21, 965751), (57, 355803), (63, 321917), (133, 152487), (171, 118601), (399, 50829), (1197, 16943)]