21696785

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 29998080

約数和(自身を除く): 8301295

約数列:

[1, 5, 11, 29, 55, 61, 145, 223, 305, 319, 671, 1115, 1595, 1769, 2453, 3355, 6467, 8845, 12265, 13603, 19459, 32335, 68015, 71137, 97295, 149633, 355685, 394487, 748165, 1972435, 4339357, 21696785]

約数ペア:

[(1, 21696785), (5, 4339357), (11, 1972435), (29, 748165), (55, 394487), (61, 355685), (145, 149633), (223, 97295), (305, 71137), (319, 68015), (671, 32335), (1115, 19459), (1595, 13603), (1769, 12265), (2453, 8845), (3355, 6467)]