20696865

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{971}}^1$

素因数の和:1022

約数の個数: 48

約数和(自身を含む): 39890880

約数和(自身を除く): 19194015

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 49, 87, 105, 145, 147, 203, 245, 435, 609, 735, 971, 1015, 1421, 2913, 3045, 4263, 4855, 6797, 7105, 14565, 20391, 21315, 28159, 33985, 47579, 84477, 101955, 140795, 142737, 197113, 237895, 422385, 591339, 713685, 985565, 1379791, 2956695, 4139373, 6898955, 20696865]

約数ペア:

[(1, 20696865), (3, 6898955), (5, 4139373), (7, 2956695), (15, 1379791), (21, 985565), (29, 713685), (35, 591339), (49, 422385), (87, 237895), (105, 197113), (145, 142737), (147, 140795), (203, 101955), (245, 84477), (435, 47579), (609, 33985), (735, 28159), (971, 21315), (1015, 20391), (1421, 14565), (2913, 7105), (3045, 6797), (4263, 4855)]