665420

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{97}}^1$

素因数の和:127

約数の個数: 48

約数和(自身を含む): 1646400

約数和(自身を除く): 980980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 97, 98, 140, 194, 196, 245, 343, 388, 485, 490, 679, 686, 970, 980, 1358, 1372, 1715, 1940, 2716, 3395, 3430, 4753, 6790, 6860, 9506, 13580, 19012, 23765, 33271, 47530, 66542, 95060, 133084, 166355, 332710, 665420]

約数ペア:

[(1, 665420), (2, 332710), (4, 166355), (5, 133084), (7, 95060), (10, 66542), (14, 47530), (20, 33271), (28, 23765), (35, 19012), (49, 13580), (70, 9506), (97, 6860), (98, 6790), (140, 4753), (194, 3430), (196, 3395), (245, 2716), (343, 1940), (388, 1715), (485, 1372), (490, 1358), (679, 980), (686, 970)]