20648745

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{751}}^1$

素因数の和:822

約数の個数: 48

約数和(自身を含む): 39416832

約数和(自身を除く): 18768087

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 47, 65, 117, 141, 195, 235, 423, 585, 611, 705, 751, 1833, 2115, 2253, 3055, 3755, 5499, 6759, 9165, 9763, 11265, 27495, 29289, 33795, 35297, 48815, 87867, 105891, 146445, 176485, 317673, 439335, 458861, 529455, 1376583, 1588365, 2294305, 4129749, 6882915, 20648745]

約数ペア:

[(1, 20648745), (3, 6882915), (5, 4129749), (9, 2294305), (13, 1588365), (15, 1376583), (39, 529455), (45, 458861), (47, 439335), (65, 317673), (117, 176485), (141, 146445), (195, 105891), (235, 87867), (423, 48815), (585, 35297), (611, 33795), (705, 29289), (751, 27495), (1833, 11265), (2115, 9763), (2253, 9165), (3055, 6759), (3755, 5499)]