21808618

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{337}}^1$

素因数の和:502

約数の個数: 32

約数和(自身を含む): 37477440

約数和(自身を除く): 15668822

約数列:

[1, 2, 13, 19, 26, 38, 131, 247, 262, 337, 494, 674, 1703, 2489, 3406, 4381, 4978, 6403, 8762, 12806, 32357, 44147, 64714, 83239, 88294, 166478, 573911, 838793, 1147822, 1677586, 10904309, 21808618]

約数ペア:

[(1, 21808618), (2, 10904309), (13, 1677586), (19, 1147822), (26, 838793), (38, 573911), (131, 166478), (247, 88294), (262, 83239), (337, 64714), (494, 44147), (674, 32357), (1703, 12806), (2489, 8762), (3406, 6403), (4381, 4978)]