640523960

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{941947}}^1$

素因数の和:941975

約数の個数: 32

約数和(自身を含む): 1525955760

約数和(自身を除く): 885431800

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 941947, 1883894, 3767788, 4709735, 7535576, 9419470, 16013099, 18838940, 32026198, 37677880, 64052396, 80065495, 128104792, 160130990, 320261980, 640523960]

約数ペア:

[(1, 640523960), (2, 320261980), (4, 160130990), (5, 128104792), (8, 80065495), (10, 64052396), (17, 37677880), (20, 32026198), (34, 18838940), (40, 16013099), (68, 9419470), (85, 7535576), (136, 4709735), (170, 3767788), (340, 1883894), (680, 941947)]