21217380

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1777}}^1$

素因数の和:1988

約数の個数: 48

約数和(自身を含む): 59740800

約数和(自身を除く): 38523420

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 199, 398, 597, 796, 995, 1194, 1777, 1990, 2388, 2985, 3554, 3980, 5331, 5970, 7108, 8885, 10662, 11940, 17770, 21324, 26655, 35540, 53310, 106620, 353623, 707246, 1060869, 1414492, 1768115, 2121738, 3536230, 4243476, 5304345, 7072460, 10608690, 21217380]

約数ペア:

[(1, 21217380), (2, 10608690), (3, 7072460), (4, 5304345), (5, 4243476), (6, 3536230), (10, 2121738), (12, 1768115), (15, 1414492), (20, 1060869), (30, 707246), (60, 353623), (199, 106620), (398, 53310), (597, 35540), (796, 26655), (995, 21324), (1194, 17770), (1777, 11940), (1990, 10662), (2388, 8885), (2985, 7108), (3554, 5970), (3980, 5331)]