209475

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{19}}^1$

素因数の和:49

約数の個数: 54

約数和(自身を含む): 459420

約数和(自身を除く): 249945

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 25, 35, 45, 49, 57, 63, 75, 95, 105, 133, 147, 171, 175, 225, 245, 285, 315, 399, 441, 475, 525, 665, 735, 855, 931, 1197, 1225, 1425, 1575, 1995, 2205, 2793, 3325, 3675, 4275, 4655, 5985, 8379, 9975, 11025, 13965, 23275, 29925, 41895, 69825, 209475]

約数ペア:

[(1, 209475), (3, 69825), (5, 41895), (7, 29925), (9, 23275), (15, 13965), (19, 11025), (21, 9975), (25, 8379), (35, 5985), (45, 4655), (49, 4275), (57, 3675), (63, 3325), (75, 2793), (95, 2205), (105, 1995), (133, 1575), (147, 1425), (171, 1225), (175, 1197), (225, 931), (245, 855), (285, 735), (315, 665), (399, 525), (441, 475)]