20400520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72859}}^1$

素因数の和:72877

約数の個数: 32

約数和(自身を含む): 52459200

約数和(自身を除く): 32058680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72859, 145718, 291436, 364295, 510013, 582872, 728590, 1020026, 1457180, 2040052, 2550065, 2914360, 4080104, 5100130, 10200260, 20400520]

約数ペア:

[(1, 20400520), (2, 10200260), (4, 5100130), (5, 4080104), (7, 2914360), (8, 2550065), (10, 2040052), (14, 1457180), (20, 1020026), (28, 728590), (35, 582872), (40, 510013), (56, 364295), (70, 291436), (140, 145718), (280, 72859)]