3999880

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{277}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 9532620

約数和(自身を除く): 5532740

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 277, 361, 380, 554, 722, 760, 1108, 1385, 1444, 1805, 2216, 2770, 2888, 3610, 5263, 5540, 7220, 10526, 11080, 14440, 21052, 26315, 42104, 52630, 99997, 105260, 199994, 210520, 399988, 499985, 799976, 999970, 1999940, 3999880]

約数ペア:

[(1, 3999880), (2, 1999940), (4, 999970), (5, 799976), (8, 499985), (10, 399988), (19, 210520), (20, 199994), (38, 105260), (40, 99997), (76, 52630), (95, 42104), (152, 26315), (190, 21052), (277, 14440), (361, 11080), (380, 10526), (554, 7220), (722, 5540), (760, 5263), (1108, 3610), (1385, 2888), (1444, 2770), (1805, 2216)]