28651760

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{8329}}^1$

素因数の和:8385

約数の個数: 40

約数和(自身を含む): 68172720

約数和(自身を除く): 39520960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 8329, 16658, 33316, 41645, 66632, 83290, 133264, 166580, 333160, 358147, 666320, 716294, 1432588, 1790735, 2865176, 3581470, 5730352, 7162940, 14325880, 28651760]

約数ペア:

[(1, 28651760), (2, 14325880), (4, 7162940), (5, 5730352), (8, 3581470), (10, 2865176), (16, 1790735), (20, 1432588), (40, 716294), (43, 666320), (80, 358147), (86, 333160), (172, 166580), (215, 133264), (344, 83290), (430, 66632), (688, 41645), (860, 33316), (1720, 16658), (3440, 8329)]