201631940

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{15679}}^1$

素因数の和:16331

約数の個数: 24

約数和(自身を含む): 424112640

約数和(自身を除く): 222480700

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 2572, 3215, 6430, 12860, 15679, 31358, 62716, 78395, 156790, 313580, 10081597, 20163194, 40326388, 50407985, 100815970, 201631940]

約数ペア:

[(1, 201631940), (2, 100815970), (4, 50407985), (5, 40326388), (10, 20163194), (20, 10081597), (643, 313580), (1286, 156790), (2572, 78395), (3215, 62716), (6430, 31358), (12860, 15679)]