21706587

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{109}}^2$

素因数の和:260

約数の個数: 36

約数和(自身を含む): 37411920

約数和(自身を除く): 15705333

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 109, 203, 261, 327, 609, 763, 981, 1827, 2289, 3161, 6867, 9483, 11881, 22127, 28449, 35643, 66381, 83167, 106929, 199143, 249501, 344549, 748503, 1033647, 2411843, 3100941, 7235529, 21706587]

約数ペア:

[(1, 21706587), (3, 7235529), (7, 3100941), (9, 2411843), (21, 1033647), (29, 748503), (63, 344549), (87, 249501), (109, 199143), (203, 106929), (261, 83167), (327, 66381), (609, 35643), (763, 28449), (981, 22127), (1827, 11881), (2289, 9483), (3161, 6867)]