421025720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{256723}}^1$

素因数の和:256775

約数の個数: 32

約数和(自身を含む): 970416720

約数和(自身を除く): 549391000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 256723, 513446, 1026892, 1283615, 2053784, 2567230, 5134460, 10268920, 10525643, 21051286, 42102572, 52628215, 84205144, 105256430, 210512860, 421025720]

約数ペア:

[(1, 421025720), (2, 210512860), (4, 105256430), (5, 84205144), (8, 52628215), (10, 42102572), (20, 21051286), (40, 10525643), (41, 10268920), (82, 5134460), (164, 2567230), (205, 2053784), (328, 1283615), (410, 1026892), (820, 513446), (1640, 256723)]