19921900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1$

素因数の和:211

約数の個数: 72

約数和(自身を含む): 45715824

約数和(自身を除く): 25793924

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 43, 50, 82, 86, 100, 113, 164, 172, 205, 215, 226, 410, 430, 452, 565, 820, 860, 1025, 1075, 1130, 1763, 2050, 2150, 2260, 2825, 3526, 4100, 4300, 4633, 4859, 5650, 7052, 8815, 9266, 9718, 11300, 17630, 18532, 19436, 23165, 24295, 35260, 44075, 46330, 48590, 88150, 92660, 97180, 115825, 121475, 176300, 199219, 231650, 242950, 398438, 463300, 485900, 796876, 996095, 1992190, 3984380, 4980475, 9960950, 19921900]

約数ペア:

[(1, 19921900), (2, 9960950), (4, 4980475), (5, 3984380), (10, 1992190), (20, 996095), (25, 796876), (41, 485900), (43, 463300), (50, 398438), (82, 242950), (86, 231650), (100, 199219), (113, 176300), (164, 121475), (172, 115825), (205, 97180), (215, 92660), (226, 88150), (410, 48590), (430, 46330), (452, 44075), (565, 35260), (820, 24295), (860, 23165), (1025, 19436), (1075, 18532), (1130, 17630), (1763, 11300), (2050, 9718), (2150, 9266), (2260, 8815), (2825, 7052), (3526, 5650), (4100, 4859), (4300, 4633)]