21902205

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6607}}^1$

素因数の和:6645

約数の個数: 32

約数和(自身を含む): 39965184

約数和(自身を除く): 18062979

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6607, 19821, 33035, 85891, 99105, 112319, 257673, 336957, 429455, 561595, 1288365, 1460147, 1684785, 4380441, 7300735, 21902205]

約数ペア:

[(1, 21902205), (3, 7300735), (5, 4380441), (13, 1684785), (15, 1460147), (17, 1288365), (39, 561595), (51, 429455), (65, 336957), (85, 257673), (195, 112319), (221, 99105), (255, 85891), (663, 33035), (1105, 19821), (3315, 6607)]