20256040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{991}}^1$

素因数の和:1082

約数の個数: 64

約数和(自身を含む): 52853760

約数和(自身を除く): 32597720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 991, 1022, 1460, 1982, 2044, 2555, 2920, 3964, 4088, 4955, 5110, 6937, 7928, 9910, 10220, 13874, 19820, 20440, 27748, 34685, 39640, 55496, 69370, 72343, 138740, 144686, 277480, 289372, 361715, 506401, 578744, 723430, 1012802, 1446860, 2025604, 2532005, 2893720, 4051208, 5064010, 10128020, 20256040]

約数ペア:

[(1, 20256040), (2, 10128020), (4, 5064010), (5, 4051208), (7, 2893720), (8, 2532005), (10, 2025604), (14, 1446860), (20, 1012802), (28, 723430), (35, 578744), (40, 506401), (56, 361715), (70, 289372), (73, 277480), (140, 144686), (146, 138740), (280, 72343), (292, 69370), (365, 55496), (511, 39640), (584, 34685), (730, 27748), (991, 20440), (1022, 19820), (1460, 13874), (1982, 10220), (2044, 9910), (2555, 7928), (2920, 6937), (3964, 5110), (4088, 4955)]