18998475

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^2\times {\mathrm{137}}^1$

素因数の和:236

約数の個数: 36

約数和(自身を含む): 32393016

約数和(自身を除く): 13394541

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 137, 215, 411, 645, 685, 1075, 1849, 2055, 3225, 3425, 5547, 5891, 9245, 10275, 17673, 27735, 29455, 46225, 88365, 138675, 147275, 253313, 441825, 759939, 1266565, 3799695, 6332825, 18998475]

約数ペア:

[(1, 18998475), (3, 6332825), (5, 3799695), (15, 1266565), (25, 759939), (43, 441825), (75, 253313), (129, 147275), (137, 138675), (215, 88365), (411, 46225), (645, 29455), (685, 27735), (1075, 17673), (1849, 10275), (2055, 9245), (3225, 5891), (3425, 5547)]