19781940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{487}}^1\times {\mathrm{677}}^1$

素因数の和:1176

約数の個数: 48

約数和(自身を含む): 55585152

約数和(自身を除く): 35803212

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 487, 677, 974, 1354, 1461, 1948, 2031, 2435, 2708, 2922, 3385, 4062, 4870, 5844, 6770, 7305, 8124, 9740, 10155, 13540, 14610, 20310, 29220, 40620, 329699, 659398, 989097, 1318796, 1648495, 1978194, 3296990, 3956388, 4945485, 6593980, 9890970, 19781940]

約数ペア:

[(1, 19781940), (2, 9890970), (3, 6593980), (4, 4945485), (5, 3956388), (6, 3296990), (10, 1978194), (12, 1648495), (15, 1318796), (20, 989097), (30, 659398), (60, 329699), (487, 40620), (677, 29220), (974, 20310), (1354, 14610), (1461, 13540), (1948, 10155), (2031, 9740), (2435, 8124), (2708, 7305), (2922, 6770), (3385, 5844), (4062, 4870)]