28141869

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{251}}^1\times {\mathrm{281}}^1$

素因数の和:561

約数の個数: 32

約数和(自身を含む): 45480960

約数和(自身を除く): 17339091

約数列:

[1, 3, 7, 19, 21, 57, 133, 251, 281, 399, 753, 843, 1757, 1967, 4769, 5271, 5339, 5901, 14307, 16017, 33383, 37373, 70531, 100149, 112119, 211593, 493717, 1340089, 1481151, 4020267, 9380623, 28141869]

約数ペア:

[(1, 28141869), (3, 9380623), (7, 4020267), (19, 1481151), (21, 1340089), (57, 493717), (133, 211593), (251, 112119), (281, 100149), (399, 70531), (753, 37373), (843, 33383), (1757, 16017), (1967, 14307), (4769, 5901), (5271, 5339)]