81920720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{241}}^1\times {\mathrm{607}}^1$

素因数の和:868

約数の個数: 80

約数和(自身を含む): 218938368

約数和(自身を除く): 137017648

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 241, 280, 482, 560, 607, 964, 1205, 1214, 1687, 1928, 2410, 2428, 3035, 3374, 3856, 4249, 4820, 4856, 6070, 6748, 8435, 8498, 9640, 9712, 12140, 13496, 16870, 16996, 19280, 21245, 24280, 26992, 33740, 33992, 42490, 48560, 67480, 67984, 84980, 134960, 146287, 169960, 292574, 339920, 585148, 731435, 1024009, 1170296, 1462870, 2048018, 2340592, 2925740, 4096036, 5120045, 5851480, 8192072, 10240090, 11702960, 16384144, 20480180, 40960360, 81920720]

約数ペア:

[(1, 81920720), (2, 40960360), (4, 20480180), (5, 16384144), (7, 11702960), (8, 10240090), (10, 8192072), (14, 5851480), (16, 5120045), (20, 4096036), (28, 2925740), (35, 2340592), (40, 2048018), (56, 1462870), (70, 1170296), (80, 1024009), (112, 731435), (140, 585148), (241, 339920), (280, 292574), (482, 169960), (560, 146287), (607, 134960), (964, 84980), (1205, 67984), (1214, 67480), (1687, 48560), (1928, 42490), (2410, 33992), (2428, 33740), (3035, 26992), (3374, 24280), (3856, 21245), (4249, 19280), (4820, 16996), (4856, 16870), (6070, 13496), (6748, 12140), (8435, 9712), (8498, 9640)]