215207960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{489109}}^1$

素因数の和:489131

約数の個数: 32

約数和(自身を含む): 528238800

約数和(自身を除く): 313030840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 489109, 978218, 1956436, 2445545, 3912872, 4891090, 5380199, 9782180, 10760398, 19564360, 21520796, 26900995, 43041592, 53801990, 107603980, 215207960]

約数ペア:

[(1, 215207960), (2, 107603980), (4, 53801990), (5, 43041592), (8, 26900995), (10, 21520796), (11, 19564360), (20, 10760398), (22, 9782180), (40, 5380199), (44, 4891090), (55, 3912872), (88, 2445545), (110, 1956436), (220, 978218), (440, 489109)]