20865670

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{439}}^1$

素因数の和:557

約数の個数: 48

約数和(自身を含む): 44241120

約数和(自身を除く): 23375450

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 97, 98, 194, 245, 439, 485, 490, 679, 878, 970, 1358, 2195, 3073, 3395, 4390, 4753, 6146, 6790, 9506, 15365, 21511, 23765, 30730, 42583, 43022, 47530, 85166, 107555, 212915, 215110, 298081, 425830, 596162, 1490405, 2086567, 2980810, 4173134, 10432835, 20865670]

約数ペア:

[(1, 20865670), (2, 10432835), (5, 4173134), (7, 2980810), (10, 2086567), (14, 1490405), (35, 596162), (49, 425830), (70, 298081), (97, 215110), (98, 212915), (194, 107555), (245, 85166), (439, 47530), (485, 43022), (490, 42583), (679, 30730), (878, 23765), (970, 21511), (1358, 15365), (2195, 9506), (3073, 6790), (3395, 6146), (4390, 4753)]