123420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1$

素因数の和:51

約数の個数: 72

約数和(自身を含む): 402192

約数和(自身を除く): 278772

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 17, 20, 22, 30, 33, 34, 44, 51, 55, 60, 66, 68, 85, 102, 110, 121, 132, 165, 170, 187, 204, 220, 242, 255, 330, 340, 363, 374, 484, 510, 561, 605, 660, 726, 748, 935, 1020, 1122, 1210, 1452, 1815, 1870, 2057, 2244, 2420, 2805, 3630, 3740, 4114, 5610, 6171, 7260, 8228, 10285, 11220, 12342, 20570, 24684, 30855, 41140, 61710, 123420]

約数ペア:

[(1, 123420), (2, 61710), (3, 41140), (4, 30855), (5, 24684), (6, 20570), (10, 12342), (11, 11220), (12, 10285), (15, 8228), (17, 7260), (20, 6171), (22, 5610), (30, 4114), (33, 3740), (34, 3630), (44, 2805), (51, 2420), (55, 2244), (60, 2057), (66, 1870), (68, 1815), (85, 1452), (102, 1210), (110, 1122), (121, 1020), (132, 935), (165, 748), (170, 726), (187, 660), (204, 605), (220, 561), (242, 510), (255, 484), (330, 374), (340, 363)]