21749091

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{599}}^1$

素因数の和:648

約数の個数: 48

約数和(自身を含む): 38304000

約数和(自身を除く): 16554909

約数列:

[1, 3, 7, 13, 19, 21, 39, 49, 57, 91, 133, 147, 247, 273, 399, 599, 637, 741, 931, 1729, 1797, 1911, 2793, 4193, 5187, 7787, 11381, 12103, 12579, 23361, 29351, 34143, 36309, 54509, 79667, 88053, 147953, 163527, 239001, 381563, 443859, 557669, 1035671, 1144689, 1673007, 3107013, 7249697, 21749091]

約数ペア:

[(1, 21749091), (3, 7249697), (7, 3107013), (13, 1673007), (19, 1144689), (21, 1035671), (39, 557669), (49, 443859), (57, 381563), (91, 239001), (133, 163527), (147, 147953), (247, 88053), (273, 79667), (399, 54509), (599, 36309), (637, 34143), (741, 29351), (931, 23361), (1729, 12579), (1797, 12103), (1911, 11381), (2793, 7787), (4193, 5187)]