21430285

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 28553472

約数和(自身を除く): 7123187

約数列:

[1, 5, 17, 53, 67, 71, 85, 265, 335, 355, 901, 1139, 1207, 3551, 3763, 4505, 4757, 5695, 6035, 17755, 18815, 23785, 60367, 63971, 80869, 252121, 301835, 319855, 404345, 1260605, 4286057, 21430285]

約数ペア:

[(1, 21430285), (5, 4286057), (17, 1260605), (53, 404345), (67, 319855), (71, 301835), (85, 252121), (265, 80869), (335, 63971), (355, 60367), (901, 23785), (1139, 18815), (1207, 17755), (3551, 6035), (3763, 5695), (4505, 4757)]