28758639

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{149}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 48837600

約数和(自身を除く): 20078961

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 101, 147, 149, 273, 303, 447, 637, 707, 1043, 1313, 1911, 1937, 2121, 3129, 3939, 4949, 5811, 7301, 9191, 13559, 14847, 15049, 21903, 27573, 40677, 45147, 64337, 94913, 105343, 193011, 195637, 284739, 316029, 586911, 737401, 1369459, 2212203, 4108377, 9586213, 28758639]

約数ペア:

[(1, 28758639), (3, 9586213), (7, 4108377), (13, 2212203), (21, 1369459), (39, 737401), (49, 586911), (91, 316029), (101, 284739), (147, 195637), (149, 193011), (273, 105343), (303, 94913), (447, 64337), (637, 45147), (707, 40677), (1043, 27573), (1313, 21903), (1911, 15049), (1937, 14847), (2121, 13559), (3129, 9191), (3939, 7301), (4949, 5811)]