21011955

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{619}}^1$

素因数の和:731

約数の個数: 32

約数和(自身を含む): 35235840

約数和(自身を除く): 14223885

約数列:

[1, 3, 5, 15, 31, 73, 93, 155, 219, 365, 465, 619, 1095, 1857, 2263, 3095, 6789, 9285, 11315, 19189, 33945, 45187, 57567, 95945, 135561, 225935, 287835, 677805, 1400797, 4202391, 7003985, 21011955]

約数ペア:

[(1, 21011955), (3, 7003985), (5, 4202391), (15, 1400797), (31, 677805), (73, 287835), (93, 225935), (155, 135561), (219, 95945), (365, 57567), (465, 45187), (619, 33945), (1095, 19189), (1857, 11315), (2263, 9285), (3095, 6789)]