20528028

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:291

約数の個数: 72

約数和(自身を含む): 54054000

約数和(自身を除く): 33525972

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 86, 89, 129, 149, 172, 178, 258, 267, 298, 356, 387, 447, 516, 534, 596, 774, 801, 894, 1068, 1341, 1548, 1602, 1788, 2682, 3204, 3827, 5364, 6407, 7654, 11481, 12814, 13261, 15308, 19221, 22962, 25628, 26522, 34443, 38442, 39783, 45924, 53044, 57663, 68886, 76884, 79566, 115326, 119349, 137772, 159132, 230652, 238698, 477396, 570223, 1140446, 1710669, 2280892, 3421338, 5132007, 6842676, 10264014, 20528028]

約数ペア:

[(1, 20528028), (2, 10264014), (3, 6842676), (4, 5132007), (6, 3421338), (9, 2280892), (12, 1710669), (18, 1140446), (36, 570223), (43, 477396), (86, 238698), (89, 230652), (129, 159132), (149, 137772), (172, 119349), (178, 115326), (258, 79566), (267, 76884), (298, 68886), (356, 57663), (387, 53044), (447, 45924), (516, 39783), (534, 38442), (596, 34443), (774, 26522), (801, 25628), (894, 22962), (1068, 19221), (1341, 15308), (1548, 13261), (1602, 12814), (1788, 11481), (2682, 7654), (3204, 6407), (3827, 5364)]