28708740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{457}}^1$

素因数の和:821

約数の個数: 72

約数和(自身を含む): 87523800

約数和(自身を除く): 58815060

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 349, 457, 698, 914, 1047, 1371, 1396, 1745, 1828, 2094, 2285, 2742, 3141, 3490, 4113, 4188, 4570, 5235, 5484, 6282, 6855, 6980, 8226, 9140, 10470, 12564, 13710, 15705, 16452, 20565, 20940, 27420, 31410, 41130, 62820, 82260, 159493, 318986, 478479, 637972, 797465, 956958, 1435437, 1594930, 1913916, 2392395, 2870874, 3189860, 4784790, 5741748, 7177185, 9569580, 14354370, 28708740]

約数ペア:

[(1, 28708740), (2, 14354370), (3, 9569580), (4, 7177185), (5, 5741748), (6, 4784790), (9, 3189860), (10, 2870874), (12, 2392395), (15, 1913916), (18, 1594930), (20, 1435437), (30, 956958), (36, 797465), (45, 637972), (60, 478479), (90, 318986), (180, 159493), (349, 82260), (457, 62820), (698, 41130), (914, 31410), (1047, 27420), (1371, 20940), (1396, 20565), (1745, 16452), (1828, 15705), (2094, 13710), (2285, 12564), (2742, 10470), (3141, 9140), (3490, 8226), (4113, 6980), (4188, 6855), (4570, 6282), (5235, 5484)]