20564565

素因数分解:

$3^1\times 5^1\times 7^4\times {\mathrm{571}}^1$

素因数の和:607

約数の個数: 40

約数和(自身を含む): 38452128

約数和(自身を除く): 17887563

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 571, 735, 1029, 1713, 1715, 2401, 2855, 3997, 5145, 7203, 8565, 11991, 12005, 19985, 27979, 36015, 59955, 83937, 139895, 195853, 419685, 587559, 979265, 1370971, 2937795, 4112913, 6854855, 20564565]

約数ペア:

[(1, 20564565), (3, 6854855), (5, 4112913), (7, 2937795), (15, 1370971), (21, 979265), (35, 587559), (49, 419685), (105, 195853), (147, 139895), (245, 83937), (343, 59955), (571, 36015), (735, 27979), (1029, 19985), (1713, 12005), (1715, 11991), (2401, 8565), (2855, 7203), (3997, 5145)]