28404025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 41341104

約数和(自身を除く): 12937079

約数列:

[1, 5, 13, 17, 25, 53, 65, 85, 97, 221, 265, 325, 425, 485, 689, 901, 1105, 1261, 1325, 1649, 2425, 3445, 4505, 5141, 5525, 6305, 8245, 11713, 17225, 21437, 22525, 25705, 31525, 41225, 58565, 66833, 87397, 107185, 128525, 292825, 334165, 436985, 535925, 1136161, 1670825, 2184925, 5680805, 28404025]

約数ペア:

[(1, 28404025), (5, 5680805), (13, 2184925), (17, 1670825), (25, 1136161), (53, 535925), (65, 436985), (85, 334165), (97, 292825), (221, 128525), (265, 107185), (325, 87397), (425, 66833), (485, 58565), (689, 41225), (901, 31525), (1105, 25705), (1261, 22525), (1325, 21437), (1649, 17225), (2425, 11713), (3445, 8245), (4505, 6305), (5141, 5525)]