20781936

素因数分解:

$2^4\times 3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{389}}^1$

素因数の和:463

約数の個数: 120

約数和(自身を含む): 67897440

約数和(自身を除く): 47115504

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 28, 36, 42, 48, 53, 56, 63, 72, 84, 106, 112, 126, 144, 159, 168, 212, 252, 318, 336, 371, 389, 424, 477, 504, 636, 742, 778, 848, 954, 1008, 1113, 1167, 1272, 1484, 1556, 1908, 2226, 2334, 2544, 2723, 2968, 3112, 3339, 3501, 3816, 4452, 4668, 5446, 5936, 6224, 6678, 7002, 7632, 8169, 8904, 9336, 10892, 13356, 14004, 16338, 17808, 18672, 20617, 21784, 24507, 26712, 28008, 32676, 41234, 43568, 49014, 53424, 56016, 61851, 65352, 82468, 98028, 123702, 130704, 144319, 164936, 185553, 196056, 247404, 288638, 329872, 371106, 392112, 432957, 494808, 577276, 742212, 865914, 989616, 1154552, 1298871, 1484424, 1731828, 2309104, 2597742, 2968848, 3463656, 5195484, 6927312, 10390968, 20781936]

約数ペア:

[(1, 20781936), (2, 10390968), (3, 6927312), (4, 5195484), (6, 3463656), (7, 2968848), (8, 2597742), (9, 2309104), (12, 1731828), (14, 1484424), (16, 1298871), (18, 1154552), (21, 989616), (24, 865914), (28, 742212), (36, 577276), (42, 494808), (48, 432957), (53, 392112), (56, 371106), (63, 329872), (72, 288638), (84, 247404), (106, 196056), (112, 185553), (126, 164936), (144, 144319), (159, 130704), (168, 123702), (212, 98028), (252, 82468), (318, 65352), (336, 61851), (371, 56016), (389, 53424), (424, 49014), (477, 43568), (504, 41234), (636, 32676), (742, 28008), (778, 26712), (848, 24507), (954, 21784), (1008, 20617), (1113, 18672), (1167, 17808), (1272, 16338), (1484, 14004), (1556, 13356), (1908, 10892), (2226, 9336), (2334, 8904), (2544, 8169), (2723, 7632), (2968, 7002), (3112, 6678), (3339, 6224), (3501, 5936), (3816, 5446), (4452, 4668)]