16988125

素因数分解:

$5^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{353}}^1$

素因数の和:391

約数の個数: 40

約数和(自身を含む): 26541504

約数和(自身を除く): 9553379

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 125, 175, 275, 353, 385, 625, 875, 1375, 1765, 1925, 2471, 3883, 4375, 6875, 8825, 9625, 12355, 19415, 27181, 44125, 48125, 61775, 97075, 135905, 220625, 308875, 485375, 679525, 1544375, 2426875, 3397625, 16988125]

約数ペア:

[(1, 16988125), (5, 3397625), (7, 2426875), (11, 1544375), (25, 679525), (35, 485375), (55, 308875), (77, 220625), (125, 135905), (175, 97075), (275, 61775), (353, 48125), (385, 44125), (625, 27181), (875, 19415), (1375, 12355), (1765, 9625), (1925, 8825), (2471, 6875), (3883, 4375)]