19997068

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{401}}^1$

素因数の和:562

約数の個数: 48

約数和(自身を含む): 43493184

約数和(自身を除く): 23496116

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 137, 182, 274, 364, 401, 548, 802, 959, 1604, 1781, 1918, 2807, 3562, 3836, 5213, 5614, 7124, 10426, 11228, 12467, 20852, 24934, 36491, 49868, 54937, 72982, 109874, 145964, 219748, 384559, 714181, 769118, 1428362, 1538236, 2856724, 4999267, 9998534, 19997068]

約数ペア:

[(1, 19997068), (2, 9998534), (4, 4999267), (7, 2856724), (13, 1538236), (14, 1428362), (26, 769118), (28, 714181), (52, 384559), (91, 219748), (137, 145964), (182, 109874), (274, 72982), (364, 54937), (401, 49868), (548, 36491), (802, 24934), (959, 20852), (1604, 12467), (1781, 11228), (1918, 10426), (2807, 7124), (3562, 5614), (3836, 5213)]