20259280

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1613}}^1$

素因数の和:1783

約数の個数: 40

約数和(自身を含む): 47432232

約数和(自身を除く): 27172952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1570, 1613, 2512, 3140, 3226, 6280, 6452, 8065, 12560, 12904, 16130, 25808, 32260, 64520, 129040, 253241, 506482, 1012964, 1266205, 2025928, 2532410, 4051856, 5064820, 10129640, 20259280]

約数ペア:

[(1, 20259280), (2, 10129640), (4, 5064820), (5, 4051856), (8, 2532410), (10, 2025928), (16, 1266205), (20, 1012964), (40, 506482), (80, 253241), (157, 129040), (314, 64520), (628, 32260), (785, 25808), (1256, 16130), (1570, 12904), (1613, 12560), (2512, 8065), (3140, 6452), (3226, 6280)]