997640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{509}}^1$

素因数の和:534

約数の個数: 48

約数和(自身を含む): 2616300

約数和(自身を除く): 1618660

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 509, 980, 1018, 1960, 2036, 2545, 3563, 4072, 5090, 7126, 10180, 14252, 17815, 20360, 24941, 28504, 35630, 49882, 71260, 99764, 124705, 142520, 199528, 249410, 498820, 997640]

約数ペア:

[(1, 997640), (2, 498820), (4, 249410), (5, 199528), (7, 142520), (8, 124705), (10, 99764), (14, 71260), (20, 49882), (28, 35630), (35, 28504), (40, 24941), (49, 20360), (56, 17815), (70, 14252), (98, 10180), (140, 7126), (196, 5090), (245, 4072), (280, 3563), (392, 2545), (490, 2036), (509, 1960), (980, 1018)]