20701400

素因数分解:

$2^3\times 5^2\times {\mathrm{89}}^1\times {\mathrm{1163}}^1$

素因数の和:1268

約数の個数: 48

約数和(自身を含む): 48713400

約数和(自身を除く): 28012000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 89, 100, 178, 200, 356, 445, 712, 890, 1163, 1780, 2225, 2326, 3560, 4450, 4652, 5815, 8900, 9304, 11630, 17800, 23260, 29075, 46520, 58150, 103507, 116300, 207014, 232600, 414028, 517535, 828056, 1035070, 2070140, 2587675, 4140280, 5175350, 10350700, 20701400]

約数ペア:

[(1, 20701400), (2, 10350700), (4, 5175350), (5, 4140280), (8, 2587675), (10, 2070140), (20, 1035070), (25, 828056), (40, 517535), (50, 414028), (89, 232600), (100, 207014), (178, 116300), (200, 103507), (356, 58150), (445, 46520), (712, 29075), (890, 23260), (1163, 17800), (1780, 11630), (2225, 9304), (2326, 8900), (3560, 5815), (4450, 4652)]