209840

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:117

約数の個数: 40

約数和(自身を含む): 507408

約数和(自身を除く): 297568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 61, 80, 86, 122, 172, 215, 244, 305, 344, 430, 488, 610, 688, 860, 976, 1220, 1720, 2440, 2623, 3440, 4880, 5246, 10492, 13115, 20984, 26230, 41968, 52460, 104920, 209840]

約数ペア:

[(1, 209840), (2, 104920), (4, 52460), (5, 41968), (8, 26230), (10, 20984), (16, 13115), (20, 10492), (40, 5246), (43, 4880), (61, 3440), (80, 2623), (86, 2440), (122, 1720), (172, 1220), (215, 976), (244, 860), (305, 688), (344, 610), (430, 488)]