991900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1$

素因数の和:143

約数の個数: 72

約数和(自身を含む): 2673440

約数和(自身を除く): 1681540

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 25, 26, 28, 35, 50, 52, 65, 70, 91, 100, 109, 130, 140, 175, 182, 218, 260, 325, 350, 364, 436, 455, 545, 650, 700, 763, 910, 1090, 1300, 1417, 1526, 1820, 2180, 2275, 2725, 2834, 3052, 3815, 4550, 5450, 5668, 7085, 7630, 9100, 9919, 10900, 14170, 15260, 19075, 19838, 28340, 35425, 38150, 39676, 49595, 70850, 76300, 99190, 141700, 198380, 247975, 495950, 991900]

約数ペア:

[(1, 991900), (2, 495950), (4, 247975), (5, 198380), (7, 141700), (10, 99190), (13, 76300), (14, 70850), (20, 49595), (25, 39676), (26, 38150), (28, 35425), (35, 28340), (50, 19838), (52, 19075), (65, 15260), (70, 14170), (91, 10900), (100, 9919), (109, 9100), (130, 7630), (140, 7085), (175, 5668), (182, 5450), (218, 4550), (260, 3815), (325, 3052), (350, 2834), (364, 2725), (436, 2275), (455, 2180), (545, 1820), (650, 1526), (700, 1417), (763, 1300), (910, 1090)]