19954025

素因数分解:

$5^2\times 7^3\times {\mathrm{13}}^1\times {\mathrm{179}}^1$

素因数の和:223

約数の個数: 48

約数和(自身を含む): 31248000

約数和(自身を除く): 11293975

約数列:

[1, 5, 7, 13, 25, 35, 49, 65, 91, 175, 179, 245, 325, 343, 455, 637, 895, 1225, 1253, 1715, 2275, 2327, 3185, 4459, 4475, 6265, 8575, 8771, 11635, 15925, 16289, 22295, 31325, 43855, 58175, 61397, 81445, 111475, 114023, 219275, 306985, 407225, 570115, 798161, 1534925, 2850575, 3990805, 19954025]

約数ペア:

[(1, 19954025), (5, 3990805), (7, 2850575), (13, 1534925), (25, 798161), (35, 570115), (49, 407225), (65, 306985), (91, 219275), (175, 114023), (179, 111475), (245, 81445), (325, 61397), (343, 58175), (455, 43855), (637, 31325), (895, 22295), (1225, 16289), (1253, 15925), (1715, 11635), (2275, 8771), (2327, 8575), (3185, 6265), (4459, 4475)]