21649873

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:205

約数の個数: 32

約数和(自身を含む): 27648000

約数和(自身を除く): 5998127

約数列:

[1, 7, 19, 31, 59, 89, 133, 217, 413, 589, 623, 1121, 1691, 1829, 2759, 4123, 5251, 7847, 11837, 12803, 19313, 34751, 36757, 52421, 99769, 162781, 243257, 366947, 698383, 1139467, 3092839, 21649873]

約数ペア:

[(1, 21649873), (7, 3092839), (19, 1139467), (31, 698383), (59, 366947), (89, 243257), (133, 162781), (217, 99769), (413, 52421), (589, 36757), (623, 34751), (1121, 19313), (1691, 12803), (1829, 11837), (2759, 7847), (4123, 5251)]