15640720

素因数分解:

$2^4\times 5^1\times {\mathrm{193}}^1\times {\mathrm{1013}}^1$

素因数の和:1219

約数の個数: 40

約数和(自身を含む): 36589176

約数和(自身を除く): 20948456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 193, 386, 772, 965, 1013, 1544, 1930, 2026, 3088, 3860, 4052, 5065, 7720, 8104, 10130, 15440, 16208, 20260, 40520, 81040, 195509, 391018, 782036, 977545, 1564072, 1955090, 3128144, 3910180, 7820360, 15640720]

約数ペア:

[(1, 15640720), (2, 7820360), (4, 3910180), (5, 3128144), (8, 1955090), (10, 1564072), (16, 977545), (20, 782036), (40, 391018), (80, 195509), (193, 81040), (386, 40520), (772, 20260), (965, 16208), (1013, 15440), (1544, 10130), (1930, 8104), (2026, 7720), (3088, 5065), (3860, 4052)]