28102005

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:207

約数の個数: 64

約数和(自身を含む): 52715520

約数和(自身を除く): 24613515

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 47, 103, 129, 135, 141, 215, 235, 309, 387, 423, 515, 645, 705, 927, 1161, 1269, 1545, 1935, 2021, 2115, 2781, 4429, 4635, 4841, 5805, 6063, 6345, 10105, 13287, 13905, 14523, 18189, 22145, 24205, 30315, 39861, 43569, 54567, 66435, 72615, 90945, 119583, 130707, 199305, 208163, 217845, 272835, 597915, 624489, 653535, 1040815, 1873467, 3122445, 5620401, 9367335, 28102005]

約数ペア:

[(1, 28102005), (3, 9367335), (5, 5620401), (9, 3122445), (15, 1873467), (27, 1040815), (43, 653535), (45, 624489), (47, 597915), (103, 272835), (129, 217845), (135, 208163), (141, 199305), (215, 130707), (235, 119583), (309, 90945), (387, 72615), (423, 66435), (515, 54567), (645, 43569), (705, 39861), (927, 30315), (1161, 24205), (1269, 22145), (1545, 18189), (1935, 14523), (2021, 13905), (2115, 13287), (2781, 10105), (4429, 6345), (4635, 6063), (4841, 5805)]