256555005

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{128599}}^1$

素因数の和:128633

約数の個数: 32

約数和(自身を含む): 493824000

約数和(自身を除く): 237268995

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995, 128599, 385797, 642995, 900193, 1928985, 2443381, 2700579, 4500965, 7330143, 12216905, 13502895, 17103667, 36650715, 51311001, 85518335, 256555005]

約数ペア:

[(1, 256555005), (3, 85518335), (5, 51311001), (7, 36650715), (15, 17103667), (19, 13502895), (21, 12216905), (35, 7330143), (57, 4500965), (95, 2700579), (105, 2443381), (133, 1928985), (285, 900193), (399, 642995), (665, 385797), (1995, 128599)]