21090555

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 38413440

約数和(自身を除く): 17322885

約数列:

[1, 3, 5, 9, 15, 37, 45, 53, 111, 159, 185, 239, 265, 333, 477, 555, 717, 795, 1195, 1665, 1961, 2151, 2385, 3585, 5883, 8843, 9805, 10755, 12667, 17649, 26529, 29415, 38001, 44215, 63335, 79587, 88245, 114003, 132645, 190005, 397935, 468679, 570015, 1406037, 2343395, 4218111, 7030185, 21090555]

約数ペア:

[(1, 21090555), (3, 7030185), (5, 4218111), (9, 2343395), (15, 1406037), (37, 570015), (45, 468679), (53, 397935), (111, 190005), (159, 132645), (185, 114003), (239, 88245), (265, 79587), (333, 63335), (477, 44215), (555, 38001), (717, 29415), (795, 26529), (1195, 17649), (1665, 12667), (1961, 10755), (2151, 9805), (2385, 8843), (3585, 5883)]