217455

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1$

素因数の和:143

約数の個数: 32

約数和(自身を含む): 422400

約数和(自身を除く): 204945

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 109, 133, 285, 327, 399, 545, 665, 763, 1635, 1995, 2071, 2289, 3815, 6213, 10355, 11445, 14497, 31065, 43491, 72485, 217455]

約数ペア:

[(1, 217455), (3, 72485), (5, 43491), (7, 31065), (15, 14497), (19, 11445), (21, 10355), (35, 6213), (57, 3815), (95, 2289), (105, 2071), (109, 1995), (133, 1635), (285, 763), (327, 665), (399, 545)]