399999825

素因数分解:

$3^2\times 5^2\times {\mathrm{83}}^1\times {\mathrm{21419}}^1$

素因数の和:21518

約数の個数: 36

約数和(自身を含む): 725109840

約数和(自身を除く): 325110015

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 83, 225, 249, 415, 747, 1245, 2075, 3735, 6225, 18675, 21419, 64257, 107095, 192771, 321285, 535475, 963855, 1606425, 1777777, 4819275, 5333331, 8888885, 15999993, 26666655, 44444425, 79999965, 133333275, 399999825]

約数ペア:

[(1, 399999825), (3, 133333275), (5, 79999965), (9, 44444425), (15, 26666655), (25, 15999993), (45, 8888885), (75, 5333331), (83, 4819275), (225, 1777777), (249, 1606425), (415, 963855), (747, 535475), (1245, 321285), (2075, 192771), (3735, 107095), (6225, 64257), (18675, 21419)]