16681940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{397}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 38513664

約数和(自身を除く): 21831724

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 191, 220, 382, 397, 764, 794, 955, 1588, 1910, 1985, 2101, 3820, 3970, 4202, 4367, 7940, 8404, 8734, 10505, 17468, 21010, 21835, 42020, 43670, 75827, 87340, 151654, 303308, 379135, 758270, 834097, 1516540, 1668194, 3336388, 4170485, 8340970, 16681940]

約数ペア:

[(1, 16681940), (2, 8340970), (4, 4170485), (5, 3336388), (10, 1668194), (11, 1516540), (20, 834097), (22, 758270), (44, 379135), (55, 303308), (110, 151654), (191, 87340), (220, 75827), (382, 43670), (397, 42020), (764, 21835), (794, 21010), (955, 17468), (1588, 10505), (1910, 8734), (1985, 8404), (2101, 7940), (3820, 4367), (3970, 4202)]