19956860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{12959}}^1$

素因数の和:12986

約数の個数: 48

約数和(自身を含む): 52254720

約数和(自身を除く): 32297860

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 12959, 25918, 51836, 64795, 90713, 129590, 142549, 181426, 259180, 285098, 362852, 453565, 570196, 712745, 907130, 997843, 1425490, 1814260, 1995686, 2850980, 3991372, 4989215, 9978430, 19956860]

約数ペア:

[(1, 19956860), (2, 9978430), (4, 4989215), (5, 3991372), (7, 2850980), (10, 1995686), (11, 1814260), (14, 1425490), (20, 997843), (22, 907130), (28, 712745), (35, 570196), (44, 453565), (55, 362852), (70, 285098), (77, 259180), (110, 181426), (140, 142549), (154, 129590), (220, 90713), (308, 64795), (385, 51836), (770, 25918), (1540, 12959)]