21457995

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6473}}^1$

素因数の和:6511

約数の個数: 32

約数和(自身を含む): 39154752

約数和(自身を除く): 17696757

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6473, 19419, 32365, 84149, 97095, 110041, 252447, 330123, 420745, 550205, 1262235, 1430533, 1650615, 4291599, 7152665, 21457995]

約数ペア:

[(1, 21457995), (3, 7152665), (5, 4291599), (13, 1650615), (15, 1430533), (17, 1262235), (39, 550205), (51, 420745), (65, 330123), (85, 252447), (195, 110041), (221, 97095), (255, 84149), (663, 32365), (1105, 19419), (3315, 6473)]