18907875

素因数分解:

$3^2\times 5^3\times 7^5$

素因数の和:56

約数の個数: 72

約数和(自身を含む): 39765024

約数和(自身を除く): 20857149

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 49, 63, 75, 105, 125, 147, 175, 225, 245, 315, 343, 375, 441, 525, 735, 875, 1029, 1125, 1225, 1575, 1715, 2205, 2401, 2625, 3087, 3675, 5145, 6125, 7203, 7875, 8575, 11025, 12005, 15435, 16807, 18375, 21609, 25725, 36015, 42875, 50421, 55125, 60025, 77175, 84035, 108045, 128625, 151263, 180075, 252105, 300125, 385875, 420175, 540225, 756315, 900375, 1260525, 2100875, 2701125, 3781575, 6302625, 18907875]

約数ペア:

[(1, 18907875), (3, 6302625), (5, 3781575), (7, 2701125), (9, 2100875), (15, 1260525), (21, 900375), (25, 756315), (35, 540225), (45, 420175), (49, 385875), (63, 300125), (75, 252105), (105, 180075), (125, 151263), (147, 128625), (175, 108045), (225, 84035), (245, 77175), (315, 60025), (343, 55125), (375, 50421), (441, 42875), (525, 36015), (735, 25725), (875, 21609), (1029, 18375), (1125, 16807), (1225, 15435), (1575, 12005), (1715, 11025), (2205, 8575), (2401, 7875), (2625, 7203), (3087, 6125), (3675, 5145)]