21597825

素因数分解:

$3^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 37733696

約数和(自身を除く): 16135871

約数列:

[1, 3, 5, 15, 25, 37, 43, 75, 111, 129, 181, 185, 215, 543, 555, 645, 905, 925, 1075, 1591, 2715, 2775, 3225, 4525, 4773, 6697, 7783, 7955, 13575, 20091, 23349, 23865, 33485, 38915, 39775, 100455, 116745, 119325, 167425, 194575, 287971, 502275, 583725, 863913, 1439855, 4319565, 7199275, 21597825]

約数ペア:

[(1, 21597825), (3, 7199275), (5, 4319565), (15, 1439855), (25, 863913), (37, 583725), (43, 502275), (75, 287971), (111, 194575), (129, 167425), (181, 119325), (185, 116745), (215, 100455), (543, 39775), (555, 38915), (645, 33485), (905, 23865), (925, 23349), (1075, 20091), (1591, 13575), (2715, 7955), (2775, 7783), (3225, 6697), (4525, 4773)]