20882745

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{163}}^1$

素因数の和:263

約数の個数: 64

約数和(自身を含む): 40776960

約数和(自身を除く): 19894215

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 73, 117, 135, 163, 195, 219, 351, 365, 489, 585, 657, 815, 949, 1095, 1467, 1755, 1971, 2119, 2445, 2847, 3285, 4401, 4745, 6357, 7335, 8541, 9855, 10595, 11899, 14235, 19071, 22005, 25623, 31785, 35697, 42705, 57213, 59495, 95355, 107091, 128115, 154687, 178485, 286065, 321273, 464061, 535455, 773435, 1392183, 1606365, 2320305, 4176549, 6960915, 20882745]

約数ペア:

[(1, 20882745), (3, 6960915), (5, 4176549), (9, 2320305), (13, 1606365), (15, 1392183), (27, 773435), (39, 535455), (45, 464061), (65, 321273), (73, 286065), (117, 178485), (135, 154687), (163, 128115), (195, 107091), (219, 95355), (351, 59495), (365, 57213), (489, 42705), (585, 35697), (657, 31785), (815, 25623), (949, 22005), (1095, 19071), (1467, 14235), (1755, 11899), (1971, 10595), (2119, 9855), (2445, 8541), (2847, 7335), (3285, 6357), (4401, 4745)]