20939640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{211}}^1\times {\mathrm{827}}^1$

素因数の和:1052

約数の個数: 64

約数和(自身を含む): 63192960

約数和(自身を除く): 42253320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 211, 422, 633, 827, 844, 1055, 1266, 1654, 1688, 2110, 2481, 2532, 3165, 3308, 4135, 4220, 4962, 5064, 6330, 6616, 8270, 8440, 9924, 12405, 12660, 16540, 19848, 24810, 25320, 33080, 49620, 99240, 174497, 348994, 523491, 697988, 872485, 1046982, 1395976, 1744970, 2093964, 2617455, 3489940, 4187928, 5234910, 6979880, 10469820, 20939640]

約数ペア:

[(1, 20939640), (2, 10469820), (3, 6979880), (4, 5234910), (5, 4187928), (6, 3489940), (8, 2617455), (10, 2093964), (12, 1744970), (15, 1395976), (20, 1046982), (24, 872485), (30, 697988), (40, 523491), (60, 348994), (120, 174497), (211, 99240), (422, 49620), (633, 33080), (827, 25320), (844, 24810), (1055, 19848), (1266, 16540), (1654, 12660), (1688, 12405), (2110, 9924), (2481, 8440), (2532, 8270), (3165, 6616), (3308, 6330), (4135, 5064), (4220, 4962)]