19999400

素因数分解:

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

素因数の和:331

約数の個数: 72

約数和(自身を含む): 49251870

約数和(自身を除く): 29252470

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 152, 190, 200, 277, 361, 380, 475, 554, 722, 760, 950, 1108, 1385, 1444, 1805, 1900, 2216, 2770, 2888, 3610, 3800, 5263, 5540, 6925, 7220, 9025, 10526, 11080, 13850, 14440, 18050, 21052, 26315, 27700, 36100, 42104, 52630, 55400, 72200, 99997, 105260, 131575, 199994, 210520, 263150, 399988, 499985, 526300, 799976, 999970, 1052600, 1999940, 2499925, 3999880, 4999850, 9999700, 19999400]

約数ペア:

[(1, 19999400), (2, 9999700), (4, 4999850), (5, 3999880), (8, 2499925), (10, 1999940), (19, 1052600), (20, 999970), (25, 799976), (38, 526300), (40, 499985), (50, 399988), (76, 263150), (95, 210520), (100, 199994), (152, 131575), (190, 105260), (200, 99997), (277, 72200), (361, 55400), (380, 52630), (475, 42104), (554, 36100), (722, 27700), (760, 26315), (950, 21052), (1108, 18050), (1385, 14440), (1444, 13850), (1805, 11080), (1900, 10526), (2216, 9025), (2770, 7220), (2888, 6925), (3610, 5540), (3800, 5263)]