21019803

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{607}}^1$

素因数の和:731

約数の個数: 32

約数和(自身を含む): 34320384

約数和(自身を除く): 13300581

約数列:

[1, 3, 7, 17, 21, 51, 97, 119, 291, 357, 607, 679, 1649, 1821, 2037, 4249, 4947, 10319, 11543, 12747, 30957, 34629, 58879, 72233, 176637, 216699, 412153, 1000943, 1236459, 3002829, 7006601, 21019803]

約数ペア:

[(1, 21019803), (3, 7006601), (7, 3002829), (17, 1236459), (21, 1000943), (51, 412153), (97, 216699), (119, 176637), (291, 72233), (357, 58879), (607, 34629), (679, 30957), (1649, 12747), (1821, 11543), (2037, 10319), (4249, 4947)]