64740320

素因数分解:

$2^5\times 5^1\times {\mathrm{239}}^1\times {\mathrm{1693}}^1$

素因数の和:1947

約数の個数: 48

約数和(自身を含む): 153679680

約数和(自身を除く): 88939360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 239, 478, 956, 1195, 1693, 1912, 2390, 3386, 3824, 4780, 6772, 7648, 8465, 9560, 13544, 16930, 19120, 27088, 33860, 38240, 54176, 67720, 135440, 270880, 404627, 809254, 1618508, 2023135, 3237016, 4046270, 6474032, 8092540, 12948064, 16185080, 32370160, 64740320]

約数ペア:

[(1, 64740320), (2, 32370160), (4, 16185080), (5, 12948064), (8, 8092540), (10, 6474032), (16, 4046270), (20, 3237016), (32, 2023135), (40, 1618508), (80, 809254), (160, 404627), (239, 270880), (478, 135440), (956, 67720), (1195, 54176), (1693, 38240), (1912, 33860), (2390, 27088), (3386, 19120), (3824, 16930), (4780, 13544), (6772, 9560), (7648, 8465)]