19812760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1217}}^1$

素因数の和:1276

約数の個数: 64

約数和(自身を含む): 49986720

約数和(自身を除く): 30173960

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1217, 1480, 1628, 2035, 2434, 3256, 4070, 4868, 6085, 8140, 9736, 12170, 13387, 16280, 24340, 26774, 45029, 48680, 53548, 66935, 90058, 107096, 133870, 180116, 225145, 267740, 360232, 450290, 495319, 535480, 900580, 990638, 1801160, 1981276, 2476595, 3962552, 4953190, 9906380, 19812760]

約数ペア:

[(1, 19812760), (2, 9906380), (4, 4953190), (5, 3962552), (8, 2476595), (10, 1981276), (11, 1801160), (20, 990638), (22, 900580), (37, 535480), (40, 495319), (44, 450290), (55, 360232), (74, 267740), (88, 225145), (110, 180116), (148, 133870), (185, 107096), (220, 90058), (296, 66935), (370, 53548), (407, 48680), (440, 45029), (740, 26774), (814, 24340), (1217, 16280), (1480, 13387), (1628, 12170), (2035, 9736), (2434, 8140), (3256, 6085), (4070, 4868)]