20878686

素因数分解:

$2^1\times 3^2\times {\mathrm{17}}^1\times {\mathrm{31}}^2\times {\mathrm{71}}^1$

素因数の和:158

約数の個数: 72

約数和(自身を含む): 50190192

約数和(自身を除く): 29311506

約数列:

[1, 2, 3, 6, 9, 17, 18, 31, 34, 51, 62, 71, 93, 102, 142, 153, 186, 213, 279, 306, 426, 527, 558, 639, 961, 1054, 1207, 1278, 1581, 1922, 2201, 2414, 2883, 3162, 3621, 4402, 4743, 5766, 6603, 7242, 8649, 9486, 10863, 13206, 16337, 17298, 19809, 21726, 32674, 37417, 39618, 49011, 68231, 74834, 98022, 112251, 136462, 147033, 204693, 224502, 294066, 336753, 409386, 614079, 673506, 1159927, 1228158, 2319854, 3479781, 6959562, 10439343, 20878686]

約数ペア:

[(1, 20878686), (2, 10439343), (3, 6959562), (6, 3479781), (9, 2319854), (17, 1228158), (18, 1159927), (31, 673506), (34, 614079), (51, 409386), (62, 336753), (71, 294066), (93, 224502), (102, 204693), (142, 147033), (153, 136462), (186, 112251), (213, 98022), (279, 74834), (306, 68231), (426, 49011), (527, 39618), (558, 37417), (639, 32674), (961, 21726), (1054, 19809), (1207, 17298), (1278, 16337), (1581, 13206), (1922, 10863), (2201, 9486), (2414, 8649), (2883, 7242), (3162, 6603), (3621, 5766), (4402, 4743)]