20849745

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1493}}^1$

素因数の和:1534

約数の個数: 48

約数和(自身を含む): 40875840

約数和(自身を除く): 20026095

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 49, 57, 95, 105, 133, 147, 245, 285, 399, 665, 735, 931, 1493, 1995, 2793, 4479, 4655, 7465, 10451, 13965, 22395, 28367, 31353, 52255, 73157, 85101, 141835, 156765, 198569, 219471, 365785, 425505, 595707, 992845, 1097355, 1389983, 2978535, 4169949, 6949915, 20849745]

約数ペア:

[(1, 20849745), (3, 6949915), (5, 4169949), (7, 2978535), (15, 1389983), (19, 1097355), (21, 992845), (35, 595707), (49, 425505), (57, 365785), (95, 219471), (105, 198569), (133, 156765), (147, 141835), (245, 85101), (285, 73157), (399, 52255), (665, 31353), (735, 28367), (931, 22395), (1493, 13965), (1995, 10451), (2793, 7465), (4479, 4655)]