21658505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{367}}^1$

素因数の和:449

約数の個数: 32

約数和(自身を含む): 30205440

約数和(自身を除く): 8546935

約数列:

[1, 5, 11, 29, 37, 55, 145, 185, 319, 367, 407, 1073, 1595, 1835, 2035, 4037, 5365, 10643, 11803, 13579, 20185, 53215, 59015, 67895, 117073, 149369, 393791, 585365, 746845, 1968955, 4331701, 21658505]

約数ペア:

[(1, 21658505), (5, 4331701), (11, 1968955), (29, 746845), (37, 585365), (55, 393791), (145, 149369), (185, 117073), (319, 67895), (367, 59015), (407, 53215), (1073, 20185), (1595, 13579), (1835, 11803), (2035, 10643), (4037, 5365)]