20391075

素因数分解:

$3^3\times 5^2\times {\mathrm{17}}^1\times {\mathrm{1777}}^1$

素因数の和:1813

約数の個数: 48

約数和(自身を含む): 39684960

約数和(自身を除く): 19293885

約数列:

[1, 3, 5, 9, 15, 17, 25, 27, 45, 51, 75, 85, 135, 153, 225, 255, 425, 459, 675, 765, 1275, 1777, 2295, 3825, 5331, 8885, 11475, 15993, 26655, 30209, 44425, 47979, 79965, 90627, 133275, 151045, 239895, 271881, 399825, 453135, 755225, 815643, 1199475, 1359405, 2265675, 4078215, 6797025, 20391075]

約数ペア:

[(1, 20391075), (3, 6797025), (5, 4078215), (9, 2265675), (15, 1359405), (17, 1199475), (25, 815643), (27, 755225), (45, 453135), (51, 399825), (75, 271881), (85, 239895), (135, 151045), (153, 133275), (225, 90627), (255, 79965), (425, 47979), (459, 44425), (675, 30209), (765, 26655), (1275, 15993), (1777, 11475), (2295, 8885), (3825, 5331)]