20901699

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{181}}^1$

素因数の和:257

約数の個数: 64

約数和(自身を含む): 39137280

約数和(自身を除く): 18235581

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 47, 63, 91, 117, 141, 181, 189, 273, 329, 351, 423, 543, 611, 819, 987, 1267, 1269, 1629, 1833, 2353, 2457, 2961, 3801, 4277, 4887, 5499, 7059, 8507, 8883, 11403, 12831, 16471, 16497, 21177, 25521, 34209, 38493, 49413, 59549, 63531, 76563, 110591, 115479, 148239, 178647, 229689, 331773, 444717, 535941, 774137, 995319, 1607823, 2322411, 2985957, 6967233, 20901699]

約数ペア:

[(1, 20901699), (3, 6967233), (7, 2985957), (9, 2322411), (13, 1607823), (21, 995319), (27, 774137), (39, 535941), (47, 444717), (63, 331773), (91, 229689), (117, 178647), (141, 148239), (181, 115479), (189, 110591), (273, 76563), (329, 63531), (351, 59549), (423, 49413), (543, 38493), (611, 34209), (819, 25521), (987, 21177), (1267, 16497), (1269, 16471), (1629, 12831), (1833, 11403), (2353, 8883), (2457, 8507), (2961, 7059), (3801, 5499), (4277, 4887)]