21392715

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1951}}^1$

素因数の和:2019

約数の個数: 32

約数和(自身を含む): 37103616

約数和(自身を除く): 15710901

約数列:

[1, 3, 5, 15, 17, 43, 51, 85, 129, 215, 255, 645, 731, 1951, 2193, 3655, 5853, 9755, 10965, 29265, 33167, 83893, 99501, 165835, 251679, 419465, 497505, 1258395, 1426181, 4278543, 7130905, 21392715]

約数ペア:

[(1, 21392715), (3, 7130905), (5, 4278543), (15, 1426181), (17, 1258395), (43, 497505), (51, 419465), (85, 251679), (129, 165835), (215, 99501), (255, 83893), (645, 33167), (731, 29265), (1951, 10965), (2193, 9755), (3655, 5853)]