28770440

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^2\times {\mathrm{389}}^1$

素因数の和:486

約数の個数: 48

約数和(自身を含む): 66444300

約数和(自身を除く): 37673860

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 389, 430, 778, 860, 1556, 1720, 1849, 1945, 3112, 3698, 3890, 7396, 7780, 9245, 14792, 15560, 16727, 18490, 33454, 36980, 66908, 73960, 83635, 133816, 167270, 334540, 669080, 719261, 1438522, 2877044, 3596305, 5754088, 7192610, 14385220, 28770440]

約数ペア:

[(1, 28770440), (2, 14385220), (4, 7192610), (5, 5754088), (8, 3596305), (10, 2877044), (20, 1438522), (40, 719261), (43, 669080), (86, 334540), (172, 167270), (215, 133816), (344, 83635), (389, 73960), (430, 66908), (778, 36980), (860, 33454), (1556, 18490), (1720, 16727), (1849, 15560), (1945, 14792), (3112, 9245), (3698, 7780), (3890, 7396)]