21285516

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:211

約数の個数: 96

約数和(自身を含む): 59609088

約数和(自身を除く): 38323572

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 43, 71, 83, 84, 86, 129, 142, 166, 172, 213, 249, 258, 284, 301, 332, 426, 497, 498, 516, 581, 602, 852, 903, 994, 996, 1162, 1204, 1491, 1743, 1806, 1988, 2324, 2982, 3053, 3486, 3569, 3612, 5893, 5964, 6106, 6972, 7138, 9159, 10707, 11786, 12212, 14276, 17679, 18318, 21371, 21414, 23572, 24983, 35358, 36636, 41251, 42742, 42828, 49966, 64113, 70716, 74949, 82502, 85484, 99932, 123753, 128226, 149898, 165004, 247506, 253399, 256452, 299796, 495012, 506798, 760197, 1013596, 1520394, 1773793, 3040788, 3547586, 5321379, 7095172, 10642758, 21285516]

約数ペア:

[(1, 21285516), (2, 10642758), (3, 7095172), (4, 5321379), (6, 3547586), (7, 3040788), (12, 1773793), (14, 1520394), (21, 1013596), (28, 760197), (42, 506798), (43, 495012), (71, 299796), (83, 256452), (84, 253399), (86, 247506), (129, 165004), (142, 149898), (166, 128226), (172, 123753), (213, 99932), (249, 85484), (258, 82502), (284, 74949), (301, 70716), (332, 64113), (426, 49966), (497, 42828), (498, 42742), (516, 41251), (581, 36636), (602, 35358), (852, 24983), (903, 23572), (994, 21414), (996, 21371), (1162, 18318), (1204, 17679), (1491, 14276), (1743, 12212), (1806, 11786), (1988, 10707), (2324, 9159), (2982, 7138), (3053, 6972), (3486, 6106), (3569, 5964), (3612, 5893)]