20999412

素因数分解:

$2^2\times 3^4\times 7^1\times {\mathrm{47}}^1\times {\mathrm{197}}^1$

素因数の和:267

約数の個数: 120

約数和(自身を含む): 64399104

約数和(自身を除く): 43399692

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 47, 54, 63, 81, 84, 94, 108, 126, 141, 162, 188, 189, 197, 252, 282, 324, 329, 378, 394, 423, 564, 567, 591, 658, 756, 788, 846, 987, 1134, 1182, 1269, 1316, 1379, 1692, 1773, 1974, 2268, 2364, 2538, 2758, 2961, 3546, 3807, 3948, 4137, 5076, 5319, 5516, 5922, 7092, 7614, 8274, 8883, 9259, 10638, 11844, 12411, 15228, 15957, 16548, 17766, 18518, 21276, 24822, 26649, 27777, 31914, 35532, 37036, 37233, 49644, 53298, 55554, 63828, 64813, 74466, 83331, 106596, 111108, 111699, 129626, 148932, 166662, 194439, 223398, 249993, 259252, 333324, 388878, 446796, 499986, 583317, 749979, 777756, 999972, 1166634, 1499958, 1749951, 2333268, 2999916, 3499902, 5249853, 6999804, 10499706, 20999412]

約数ペア:

[(1, 20999412), (2, 10499706), (3, 6999804), (4, 5249853), (6, 3499902), (7, 2999916), (9, 2333268), (12, 1749951), (14, 1499958), (18, 1166634), (21, 999972), (27, 777756), (28, 749979), (36, 583317), (42, 499986), (47, 446796), (54, 388878), (63, 333324), (81, 259252), (84, 249993), (94, 223398), (108, 194439), (126, 166662), (141, 148932), (162, 129626), (188, 111699), (189, 111108), (197, 106596), (252, 83331), (282, 74466), (324, 64813), (329, 63828), (378, 55554), (394, 53298), (423, 49644), (564, 37233), (567, 37036), (591, 35532), (658, 31914), (756, 27777), (788, 26649), (846, 24822), (987, 21276), (1134, 18518), (1182, 17766), (1269, 16548), (1316, 15957), (1379, 15228), (1692, 12411), (1773, 11844), (1974, 10638), (2268, 9259), (2364, 8883), (2538, 8274), (2758, 7614), (2961, 7092), (3546, 5922), (3807, 5516), (3948, 5319), (4137, 5076)]