20480180

素因数分解:

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

素因数の和:864

約数の個数: 48

約数和(自身を含む): 49437696

約数和(自身を除く): 28957516

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 241, 482, 607, 964, 1205, 1214, 1687, 2410, 2428, 3035, 3374, 4249, 4820, 6070, 6748, 8435, 8498, 12140, 16870, 16996, 21245, 33740, 42490, 84980, 146287, 292574, 585148, 731435, 1024009, 1462870, 2048018, 2925740, 4096036, 5120045, 10240090, 20480180]

約数ペア:

[(1, 20480180), (2, 10240090), (4, 5120045), (5, 4096036), (7, 2925740), (10, 2048018), (14, 1462870), (20, 1024009), (28, 731435), (35, 585148), (70, 292574), (140, 146287), (241, 84980), (482, 42490), (607, 33740), (964, 21245), (1205, 16996), (1214, 16870), (1687, 12140), (2410, 8498), (2428, 8435), (3035, 6748), (3374, 6070), (4249, 4820)]