20979960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{359}}^1\times {\mathrm{487}}^1$

素因数の和:860

約数の個数: 64

約数和(自身を含む): 63244800

約数和(自身を除く): 42264840

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 359, 487, 718, 974, 1077, 1436, 1461, 1795, 1948, 2154, 2435, 2872, 2922, 3590, 3896, 4308, 4870, 5385, 5844, 7180, 7305, 8616, 9740, 10770, 11688, 14360, 14610, 19480, 21540, 29220, 43080, 58440, 174833, 349666, 524499, 699332, 874165, 1048998, 1398664, 1748330, 2097996, 2622495, 3496660, 4195992, 5244990, 6993320, 10489980, 20979960]

約数ペア:

[(1, 20979960), (2, 10489980), (3, 6993320), (4, 5244990), (5, 4195992), (6, 3496660), (8, 2622495), (10, 2097996), (12, 1748330), (15, 1398664), (20, 1048998), (24, 874165), (30, 699332), (40, 524499), (60, 349666), (120, 174833), (359, 58440), (487, 43080), (718, 29220), (974, 21540), (1077, 19480), (1436, 14610), (1461, 14360), (1795, 11688), (1948, 10770), (2154, 9740), (2435, 8616), (2872, 7305), (2922, 7180), (3590, 5844), (3896, 5385), (4308, 4870)]