18940425

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{839}}^1$

素因数の和:902

約数の個数: 48

約数和(自身を含む): 36664320

約数和(自身を除く): 17723895

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 43, 75, 105, 129, 175, 215, 301, 525, 645, 839, 903, 1075, 1505, 2517, 3225, 4195, 4515, 5873, 7525, 12585, 17619, 20975, 22575, 29365, 36077, 62925, 88095, 108231, 146825, 180385, 252539, 440475, 541155, 757617, 901925, 1262695, 2705775, 3788085, 6313475, 18940425]

約数ペア:

[(1, 18940425), (3, 6313475), (5, 3788085), (7, 2705775), (15, 1262695), (21, 901925), (25, 757617), (35, 541155), (43, 440475), (75, 252539), (105, 180385), (129, 146825), (175, 108231), (215, 88095), (301, 62925), (525, 36077), (645, 29365), (839, 22575), (903, 20975), (1075, 17619), (1505, 12585), (2517, 7525), (3225, 5873), (4195, 4515)]