21870369

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{149}}^1\times {\mathrm{347}}^1$

素因数の和:549

約数の個数: 24

約数和(自身を含む): 32572800

約数和(自身を除く): 10702431

約数列:

[1, 3, 9, 47, 141, 149, 347, 423, 447, 1041, 1341, 3123, 7003, 16309, 21009, 48927, 51703, 63027, 146781, 155109, 465327, 2430041, 7290123, 21870369]

約数ペア:

[(1, 21870369), (3, 7290123), (9, 2430041), (47, 465327), (141, 155109), (149, 146781), (347, 63027), (423, 51703), (447, 48927), (1041, 21009), (1341, 16309), (3123, 7003)]