20494980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{941}}^1$

素因数の和:978

約数の個数: 108

約数和(自身を含む): 68406156

約数和(自身を除く): 47911176

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 121, 132, 165, 180, 198, 220, 242, 330, 363, 396, 484, 495, 605, 660, 726, 941, 990, 1089, 1210, 1452, 1815, 1882, 1980, 2178, 2420, 2823, 3630, 3764, 4356, 4705, 5445, 5646, 7260, 8469, 9410, 10351, 10890, 11292, 14115, 16938, 18820, 20702, 21780, 28230, 31053, 33876, 41404, 42345, 51755, 56460, 62106, 84690, 93159, 103510, 113861, 124212, 155265, 169380, 186318, 207020, 227722, 310530, 341583, 372636, 455444, 465795, 569305, 621060, 683166, 931590, 1024749, 1138610, 1366332, 1707915, 1863180, 2049498, 2277220, 3415830, 4098996, 5123745, 6831660, 10247490, 20494980]

約数ペア:

[(1, 20494980), (2, 10247490), (3, 6831660), (4, 5123745), (5, 4098996), (6, 3415830), (9, 2277220), (10, 2049498), (11, 1863180), (12, 1707915), (15, 1366332), (18, 1138610), (20, 1024749), (22, 931590), (30, 683166), (33, 621060), (36, 569305), (44, 465795), (45, 455444), (55, 372636), (60, 341583), (66, 310530), (90, 227722), (99, 207020), (110, 186318), (121, 169380), (132, 155265), (165, 124212), (180, 113861), (198, 103510), (220, 93159), (242, 84690), (330, 62106), (363, 56460), (396, 51755), (484, 42345), (495, 41404), (605, 33876), (660, 31053), (726, 28230), (941, 21780), (990, 20702), (1089, 18820), (1210, 16938), (1452, 14115), (1815, 11292), (1882, 10890), (1980, 10351), (2178, 9410), (2420, 8469), (2823, 7260), (3630, 5646), (3764, 5445), (4356, 4705)]