19875921

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{197}}^1\times {\mathrm{199}}^1$

素因数の和:425

約数の個数: 24

約数和(自身を含む): 28987200

約数和(自身を除く): 9111279

約数列:

[1, 3, 13, 39, 169, 197, 199, 507, 591, 597, 2561, 2587, 7683, 7761, 33293, 33631, 39203, 99879, 100893, 117609, 509639, 1528917, 6625307, 19875921]

約数ペア:

[(1, 19875921), (3, 6625307), (13, 1528917), (39, 509639), (169, 117609), (197, 100893), (199, 99879), (507, 39203), (591, 33631), (597, 33293), (2561, 7761), (2587, 7683)]