20396240

素因数分解:

$2^4\times 5^1\times {\mathrm{193}}^1\times {\mathrm{1321}}^1$

素因数の和:1527

約数の個数: 40

約数和(自身を含む): 47703048

約数和(自身を除く): 27306808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 193, 386, 772, 965, 1321, 1544, 1930, 2642, 3088, 3860, 5284, 6605, 7720, 10568, 13210, 15440, 21136, 26420, 52840, 105680, 254953, 509906, 1019812, 1274765, 2039624, 2549530, 4079248, 5099060, 10198120, 20396240]

約数ペア:

[(1, 20396240), (2, 10198120), (4, 5099060), (5, 4079248), (8, 2549530), (10, 2039624), (16, 1274765), (20, 1019812), (40, 509906), (80, 254953), (193, 105680), (386, 52840), (772, 26420), (965, 21136), (1321, 15440), (1544, 13210), (1930, 10568), (2642, 7720), (3088, 6605), (3860, 5284)]