20991792

素因数分解:

$2^4\times 3^1\times {\mathrm{163}}^1\times {\mathrm{2683}}^1$

素因数の和:2857

約数の個数: 40

約数和(自身を含む): 54581824

約数和(自身を除く): 33590032

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 163, 326, 489, 652, 978, 1304, 1956, 2608, 2683, 3912, 5366, 7824, 8049, 10732, 16098, 21464, 32196, 42928, 64392, 128784, 437329, 874658, 1311987, 1749316, 2623974, 3498632, 5247948, 6997264, 10495896, 20991792]

約数ペア:

[(1, 20991792), (2, 10495896), (3, 6997264), (4, 5247948), (6, 3498632), (8, 2623974), (12, 1749316), (16, 1311987), (24, 874658), (48, 437329), (163, 128784), (326, 64392), (489, 42928), (652, 32196), (978, 21464), (1304, 16098), (1956, 10732), (2608, 8049), (2683, 7824), (3912, 5366)]