21328203

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{269}}^1$

素因数の和:411

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 11330997

約数列:

[1, 3, 13, 19, 39, 57, 107, 247, 269, 321, 741, 807, 1391, 2033, 3497, 4173, 5111, 6099, 10491, 15333, 26429, 28783, 66443, 79287, 86349, 199329, 374179, 546877, 1122537, 1640631, 7109401, 21328203]

約数ペア:

[(1, 21328203), (3, 7109401), (13, 1640631), (19, 1122537), (39, 546877), (57, 374179), (107, 199329), (247, 86349), (269, 79287), (321, 66443), (741, 28783), (807, 26429), (1391, 15333), (2033, 10491), (3497, 6099), (4173, 5111)]