18804775

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:160

約数の個数: 48

約数和(自身を含む): 27676800

約数和(自身を除く): 8872025

約数列:

[1, 5, 11, 19, 25, 55, 59, 61, 95, 209, 275, 295, 305, 475, 649, 671, 1045, 1121, 1159, 1475, 1525, 3245, 3355, 3599, 5225, 5605, 5795, 12331, 12749, 16225, 16775, 17995, 28025, 28975, 39589, 61655, 63745, 68381, 89975, 197945, 308275, 318725, 341905, 752191, 989725, 1709525, 3760955, 18804775]

約数ペア:

[(1, 18804775), (5, 3760955), (11, 1709525), (19, 989725), (25, 752191), (55, 341905), (59, 318725), (61, 308275), (95, 197945), (209, 89975), (275, 68381), (295, 63745), (305, 61655), (475, 39589), (649, 28975), (671, 28025), (1045, 17995), (1121, 16775), (1159, 16225), (1475, 12749), (1525, 12331), (3245, 5795), (3355, 5605), (3599, 5225)]