21287868

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{253427}}^1$

素因数の和:253441

約数の個数: 24

約数和(自身を含む): 56767872

約数和(自身を除く): 35480004

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 253427, 506854, 760281, 1013708, 1520562, 1773989, 3041124, 3547978, 5321967, 7095956, 10643934, 21287868]

約数ペア:

[(1, 21287868), (2, 10643934), (3, 7095956), (4, 5321967), (6, 3547978), (7, 3041124), (12, 1773989), (14, 1520562), (21, 1013708), (28, 760281), (42, 506854), (84, 253427)]