19540275

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{83}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 33914496

約数和(自身を除く): 14374221

約数列:

[1, 3, 5, 15, 25, 43, 73, 75, 83, 129, 215, 219, 249, 365, 415, 645, 1075, 1095, 1245, 1825, 2075, 3139, 3225, 3569, 5475, 6059, 6225, 9417, 10707, 15695, 17845, 18177, 30295, 47085, 53535, 78475, 89225, 90885, 151475, 235425, 260537, 267675, 454425, 781611, 1302685, 3908055, 6513425, 19540275]

約数ペア:

[(1, 19540275), (3, 6513425), (5, 3908055), (15, 1302685), (25, 781611), (43, 454425), (73, 267675), (75, 260537), (83, 235425), (129, 151475), (215, 90885), (219, 89225), (249, 78475), (365, 53535), (415, 47085), (645, 30295), (1075, 18177), (1095, 17845), (1245, 15695), (1825, 10707), (2075, 9417), (3139, 6225), (3225, 6059), (3569, 5475)]