646160

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:251

約数の個数: 40

約数和(自身を含む): 1546776

約数和(自身を除く): 900616

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 197, 205, 328, 394, 410, 656, 788, 820, 985, 1576, 1640, 1970, 3152, 3280, 3940, 7880, 8077, 15760, 16154, 32308, 40385, 64616, 80770, 129232, 161540, 323080, 646160]

約数ペア:

[(1, 646160), (2, 323080), (4, 161540), (5, 129232), (8, 80770), (10, 64616), (16, 40385), (20, 32308), (40, 16154), (41, 15760), (80, 8077), (82, 7880), (164, 3940), (197, 3280), (205, 3152), (328, 1970), (394, 1640), (410, 1576), (656, 985), (788, 820)]