21340970

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{449}}^1$

素因数の和:567

約数の個数: 48

約数和(自身を含む): 45246600

約数和(自身を除く): 23905630

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 97, 98, 194, 245, 449, 485, 490, 679, 898, 970, 1358, 2245, 3143, 3395, 4490, 4753, 6286, 6790, 9506, 15715, 22001, 23765, 31430, 43553, 44002, 47530, 87106, 110005, 217765, 220010, 304871, 435530, 609742, 1524355, 2134097, 3048710, 4268194, 10670485, 21340970]

約数ペア:

[(1, 21340970), (2, 10670485), (5, 4268194), (7, 3048710), (10, 2134097), (14, 1524355), (35, 609742), (49, 435530), (70, 304871), (97, 220010), (98, 217765), (194, 110005), (245, 87106), (449, 47530), (485, 44002), (490, 43553), (679, 31430), (898, 23765), (970, 22001), (1358, 15715), (2245, 9506), (3143, 6790), (3395, 6286), (4490, 4753)]