12991820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{191}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 29030400

約数和(自身を除く): 16038580

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 179, 190, 191, 358, 380, 382, 716, 764, 895, 955, 1790, 1910, 3401, 3580, 3629, 3820, 6802, 7258, 13604, 14516, 17005, 18145, 34010, 34189, 36290, 68020, 68378, 72580, 136756, 170945, 341890, 649591, 683780, 1299182, 2598364, 3247955, 6495910, 12991820]

約数ペア:

[(1, 12991820), (2, 6495910), (4, 3247955), (5, 2598364), (10, 1299182), (19, 683780), (20, 649591), (38, 341890), (76, 170945), (95, 136756), (179, 72580), (190, 68378), (191, 68020), (358, 36290), (380, 34189), (382, 34010), (716, 18145), (764, 17005), (895, 14516), (955, 13604), (1790, 7258), (1910, 6802), (3401, 3820), (3580, 3629)]