19800207

素因数分解:

$3^4\times 7^1\times {\mathrm{47}}^1\times {\mathrm{743}}^1$

素因数の和:809

約数の個数: 40

約数和(自身を含む): 34569216

約数和(自身を除く): 14769009

約数列:

[1, 3, 7, 9, 21, 27, 47, 63, 81, 141, 189, 329, 423, 567, 743, 987, 1269, 2229, 2961, 3807, 5201, 6687, 8883, 15603, 20061, 26649, 34921, 46809, 60183, 104763, 140427, 244447, 314289, 421281, 733341, 942867, 2200023, 2828601, 6600069, 19800207]

約数ペア:

[(1, 19800207), (3, 6600069), (7, 2828601), (9, 2200023), (21, 942867), (27, 733341), (47, 421281), (63, 314289), (81, 244447), (141, 140427), (189, 104763), (329, 60183), (423, 46809), (567, 34921), (743, 26649), (987, 20061), (1269, 15603), (2229, 8883), (2961, 6687), (3807, 5201)]