20871684

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:289

約数の個数: 72

約数和(自身を含む): 54934880

約数和(自身を除く): 34063196

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 86, 97, 129, 139, 172, 194, 258, 278, 291, 387, 388, 417, 516, 556, 582, 774, 834, 873, 1164, 1251, 1548, 1668, 1746, 2502, 3492, 4171, 5004, 5977, 8342, 11954, 12513, 13483, 16684, 17931, 23908, 25026, 26966, 35862, 37539, 40449, 50052, 53793, 53932, 71724, 75078, 80898, 107586, 121347, 150156, 161796, 215172, 242694, 485388, 579769, 1159538, 1739307, 2319076, 3478614, 5217921, 6957228, 10435842, 20871684]

約数ペア:

[(1, 20871684), (2, 10435842), (3, 6957228), (4, 5217921), (6, 3478614), (9, 2319076), (12, 1739307), (18, 1159538), (36, 579769), (43, 485388), (86, 242694), (97, 215172), (129, 161796), (139, 150156), (172, 121347), (194, 107586), (258, 80898), (278, 75078), (291, 71724), (387, 53932), (388, 53793), (417, 50052), (516, 40449), (556, 37539), (582, 35862), (774, 26966), (834, 25026), (873, 23908), (1164, 17931), (1251, 16684), (1548, 13483), (1668, 12513), (1746, 11954), (2502, 8342), (3492, 5977), (4171, 5004)]