19906803

素因数分解:

$3^6\times 7^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:155

約数の個数: 56

約数和(自身を含む): 35255808

約数和(自身を除く): 15349005

約数列:

[1, 3, 7, 9, 21, 27, 47, 63, 81, 83, 141, 189, 243, 249, 329, 423, 567, 581, 729, 747, 987, 1269, 1701, 1743, 2241, 2961, 3807, 3901, 5103, 5229, 6723, 8883, 11421, 11703, 15687, 20169, 26649, 27307, 34263, 35109, 47061, 60507, 79947, 81921, 105327, 141183, 239841, 245763, 315981, 423549, 737289, 947943, 2211867, 2843829, 6635601, 19906803]

約数ペア:

[(1, 19906803), (3, 6635601), (7, 2843829), (9, 2211867), (21, 947943), (27, 737289), (47, 423549), (63, 315981), (81, 245763), (83, 239841), (141, 141183), (189, 105327), (243, 81921), (249, 79947), (329, 60507), (423, 47061), (567, 35109), (581, 34263), (729, 27307), (747, 26649), (987, 20169), (1269, 15687), (1701, 11703), (1743, 11421), (2241, 8883), (2961, 6723), (3807, 5229), (3901, 5103)]