19771521

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{251}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 34320384

約数和(自身を除く): 14548863

約数列:

[1, 3, 7, 11, 21, 31, 33, 77, 93, 121, 217, 231, 251, 341, 363, 651, 753, 847, 1023, 1757, 2387, 2541, 2761, 3751, 5271, 7161, 7781, 8283, 11253, 19327, 23343, 26257, 30371, 54467, 57981, 78771, 85591, 91113, 163401, 212597, 256773, 599137, 637791, 941501, 1797411, 2824503, 6590507, 19771521]

約数ペア:

[(1, 19771521), (3, 6590507), (7, 2824503), (11, 1797411), (21, 941501), (31, 637791), (33, 599137), (77, 256773), (93, 212597), (121, 163401), (217, 91113), (231, 85591), (251, 78771), (341, 57981), (363, 54467), (651, 30371), (753, 26257), (847, 23343), (1023, 19327), (1757, 11253), (2387, 8283), (2541, 7781), (2761, 7161), (3751, 5271)]