20742345

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{223}}^1$

素因数の和:303

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 19900215

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 53, 65, 117, 135, 159, 195, 223, 265, 351, 477, 585, 669, 689, 795, 1115, 1431, 1755, 2007, 2067, 2385, 2899, 3345, 3445, 6021, 6201, 7155, 8697, 10035, 10335, 11819, 14495, 18603, 26091, 30105, 31005, 35457, 43485, 59095, 78273, 93015, 106371, 130455, 153647, 177285, 319113, 391365, 460941, 531855, 768235, 1382823, 1595565, 2304705, 4148469, 6914115, 20742345]

約数ペア:

[(1, 20742345), (3, 6914115), (5, 4148469), (9, 2304705), (13, 1595565), (15, 1382823), (27, 768235), (39, 531855), (45, 460941), (53, 391365), (65, 319113), (117, 177285), (135, 153647), (159, 130455), (195, 106371), (223, 93015), (265, 78273), (351, 59095), (477, 43485), (585, 35457), (669, 31005), (689, 30105), (795, 26091), (1115, 18603), (1431, 14495), (1755, 11819), (2007, 10335), (2067, 10035), (2385, 8697), (2899, 7155), (3345, 6201), (3445, 6021)]