21612921

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{571}}^1$

素因数の和:653

約数の個数: 32

約数和(自身を含む): 33386496

約数和(自身を除く): 11773575

約数列:

[1, 3, 11, 31, 33, 37, 93, 111, 341, 407, 571, 1023, 1147, 1221, 1713, 3441, 6281, 12617, 17701, 18843, 21127, 37851, 53103, 63381, 194711, 232397, 584133, 654937, 697191, 1964811, 7204307, 21612921]

約数ペア:

[(1, 21612921), (3, 7204307), (11, 1964811), (31, 697191), (33, 654937), (37, 584133), (93, 232397), (111, 194711), (341, 63381), (407, 53103), (571, 37851), (1023, 21127), (1147, 18843), (1221, 17701), (1713, 12617), (3441, 6281)]