21982779

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1$

素因数の和:441

約数の個数: 64

約数和(自身を含む): 41932800

約数和(自身を除く): 19950021

約数列:

[1, 3, 7, 9, 13, 21, 23, 27, 39, 63, 69, 91, 117, 161, 189, 207, 273, 299, 351, 389, 483, 621, 819, 897, 1167, 1449, 2093, 2457, 2691, 2723, 3501, 4347, 5057, 6279, 8073, 8169, 8947, 10503, 15171, 18837, 24507, 26841, 35399, 45513, 56511, 62629, 73521, 80523, 106197, 116311, 136539, 187887, 241569, 318591, 348933, 563661, 814177, 955773, 1046799, 1690983, 2442531, 3140397, 7327593, 21982779]

約数ペア:

[(1, 21982779), (3, 7327593), (7, 3140397), (9, 2442531), (13, 1690983), (21, 1046799), (23, 955773), (27, 814177), (39, 563661), (63, 348933), (69, 318591), (91, 241569), (117, 187887), (161, 136539), (189, 116311), (207, 106197), (273, 80523), (299, 73521), (351, 62629), (389, 56511), (483, 45513), (621, 35399), (819, 26841), (897, 24507), (1167, 18837), (1449, 15171), (2093, 10503), (2457, 8947), (2691, 8169), (2723, 8073), (3501, 6279), (4347, 5057)]