21408321

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1231}}^1$

素因数の和:1293

約数の個数: 32

約数和(自身を含む): 34062336

約数和(自身を除く): 12654015

約数列:

[1, 3, 11, 17, 31, 33, 51, 93, 187, 341, 527, 561, 1023, 1231, 1581, 3693, 5797, 13541, 17391, 20927, 38161, 40623, 62781, 114483, 230197, 419771, 648737, 690591, 1259313, 1946211, 7136107, 21408321]

約数ペア:

[(1, 21408321), (3, 7136107), (11, 1946211), (17, 1259313), (31, 690591), (33, 648737), (51, 419771), (93, 230197), (187, 114483), (341, 62781), (527, 40623), (561, 38161), (1023, 20927), (1231, 17391), (1581, 13541), (3693, 5797)]