21357455

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{617}}^1$

素因数の和:695

約数の個数: 32

約数和(自身を含む): 31325184

約数和(自身を除く): 9967729

約数列:

[1, 5, 7, 23, 35, 43, 115, 161, 215, 301, 617, 805, 989, 1505, 3085, 4319, 4945, 6923, 14191, 21595, 26531, 34615, 70955, 99337, 132655, 185717, 496685, 610213, 928585, 3051065, 4271491, 21357455]

約数ペア:

[(1, 21357455), (5, 4271491), (7, 3051065), (23, 928585), (35, 610213), (43, 496685), (115, 185717), (161, 132655), (215, 99337), (301, 70955), (617, 34615), (805, 26531), (989, 21595), (1505, 14191), (3085, 6923), (4319, 4945)]