16915985

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 22619520

約数和(自身を除く): 5703535

約数列:

[1, 5, 19, 41, 43, 95, 101, 205, 215, 505, 779, 817, 1763, 1919, 3895, 4085, 4141, 4343, 8815, 9595, 20705, 21715, 33497, 78679, 82517, 167485, 178063, 393395, 412585, 890315, 3383197, 16915985]

約数ペア:

[(1, 16915985), (5, 3383197), (19, 890315), (41, 412585), (43, 393395), (95, 178063), (101, 167485), (205, 82517), (215, 78679), (505, 33497), (779, 21715), (817, 20705), (1763, 9595), (1919, 8815), (3895, 4343), (4085, 4141)]