21065156

素因数分解:

$2^2\times 7^1\times {\mathrm{421}}^1\times {\mathrm{1787}}^1$

素因数の和:2219

約数の個数: 24

約数和(自身を含む): 42254016

約数和(自身を除く): 21188860

約数列:

[1, 2, 4, 7, 14, 28, 421, 842, 1684, 1787, 2947, 3574, 5894, 7148, 11788, 12509, 25018, 50036, 752327, 1504654, 3009308, 5266289, 10532578, 21065156]

約数ペア:

[(1, 21065156), (2, 10532578), (4, 5266289), (7, 3009308), (14, 1504654), (28, 752327), (421, 50036), (842, 25018), (1684, 12509), (1787, 11788), (2947, 7148), (3574, 5894)]