640665

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{619}}^1$

素因数の和:653

約数の個数: 24

約数和(自身を含む): 1160640

約数和(自身を除く): 519975

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 619, 1035, 1857, 3095, 5571, 9285, 14237, 27855, 42711, 71185, 128133, 213555, 640665]

約数ペア:

[(1, 640665), (3, 213555), (5, 128133), (9, 71185), (15, 42711), (23, 27855), (45, 14237), (69, 9285), (115, 5571), (207, 3095), (345, 1857), (619, 1035)]