20508985

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{349}}^1$

素因数の和:457

約数の個数: 32

約数和(自身を含む): 29836800

約数和(自身を除く): 9327815

約数列:

[1, 5, 7, 23, 35, 73, 115, 161, 349, 365, 511, 805, 1679, 1745, 2443, 2555, 8027, 8395, 11753, 12215, 25477, 40135, 56189, 58765, 127385, 178339, 280945, 585971, 891695, 2929855, 4101797, 20508985]

約数ペア:

[(1, 20508985), (5, 4101797), (7, 2929855), (23, 891695), (35, 585971), (73, 280945), (115, 178339), (161, 127385), (349, 58765), (365, 56189), (511, 40135), (805, 25477), (1679, 12215), (1745, 11753), (2443, 8395), (2555, 8027)]