642140

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{331}}^1$

素因数の和:437

約数の個数: 24

約数和(自身を含む): 1366512

約数和(自身を除く): 724372

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 331, 388, 485, 662, 970, 1324, 1655, 1940, 3310, 6620, 32107, 64214, 128428, 160535, 321070, 642140]

約数ペア:

[(1, 642140), (2, 321070), (4, 160535), (5, 128428), (10, 64214), (20, 32107), (97, 6620), (194, 3310), (331, 1940), (388, 1655), (485, 1324), (662, 970)]