28987205

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 39160800

約数和(自身を除く): 10173595

約数列:

[1, 5, 13, 41, 65, 73, 149, 205, 365, 533, 745, 949, 1937, 2665, 2993, 4745, 6109, 9685, 10877, 14965, 30545, 38909, 54385, 79417, 141401, 194545, 397085, 445957, 707005, 2229785, 5797441, 28987205]

約数ペア:

[(1, 28987205), (5, 5797441), (13, 2229785), (41, 707005), (65, 445957), (73, 397085), (149, 194545), (205, 141401), (365, 79417), (533, 54385), (745, 38909), (949, 30545), (1937, 14965), (2665, 10877), (2993, 9685), (4745, 6109)]