20615980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1217}}^1$

素因数の和:1255

約数の個数: 72

約数和(自身を含む): 54429984

約数和(自身を除く): 33814004

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1210, 1217, 1540, 1694, 2420, 2434, 3388, 4235, 4868, 6085, 8470, 8519, 12170, 13387, 16940, 17038, 24340, 26774, 34076, 42595, 53548, 66935, 85190, 93709, 133870, 147257, 170380, 187418, 267740, 294514, 374836, 468545, 589028, 736285, 937090, 1030799, 1472570, 1874180, 2061598, 2945140, 4123196, 5153995, 10307990, 20615980]

約数ペア:

[(1, 20615980), (2, 10307990), (4, 5153995), (5, 4123196), (7, 2945140), (10, 2061598), (11, 1874180), (14, 1472570), (20, 1030799), (22, 937090), (28, 736285), (35, 589028), (44, 468545), (55, 374836), (70, 294514), (77, 267740), (110, 187418), (121, 170380), (140, 147257), (154, 133870), (220, 93709), (242, 85190), (308, 66935), (385, 53548), (484, 42595), (605, 34076), (770, 26774), (847, 24340), (1210, 17038), (1217, 16940), (1540, 13387), (1694, 12170), (2420, 8519), (2434, 8470), (3388, 6085), (4235, 4868)]