21919821

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{3061}}^1$

素因数の和:3113

約数の個数: 32

約数和(自身を含む): 37625856

約数和(自身を除く): 15706035

約数列:

[1, 3, 7, 11, 21, 31, 33, 77, 93, 217, 231, 341, 651, 1023, 2387, 3061, 7161, 9183, 21427, 33671, 64281, 94891, 101013, 235697, 284673, 664237, 707091, 1043801, 1992711, 3131403, 7306607, 21919821]

約数ペア:

[(1, 21919821), (3, 7306607), (7, 3131403), (11, 1992711), (21, 1043801), (31, 707091), (33, 664237), (77, 284673), (93, 235697), (217, 101013), (231, 94891), (341, 64281), (651, 33671), (1023, 21427), (2387, 9183), (3061, 7161)]