21063640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40507}}^1$

素因数の和:40531

約数の個数: 32

約数和(自身を含む): 51040080

約数和(自身を除く): 29976440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40507, 81014, 162028, 202535, 324056, 405070, 526591, 810140, 1053182, 1620280, 2106364, 2632955, 4212728, 5265910, 10531820, 21063640]

約数ペア:

[(1, 21063640), (2, 10531820), (4, 5265910), (5, 4212728), (8, 2632955), (10, 2106364), (13, 1620280), (20, 1053182), (26, 810140), (40, 526591), (52, 405070), (65, 324056), (104, 202535), (130, 162028), (260, 81014), (520, 40507)]