12640040

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{6449}}^1$

素因数の和:6474

約数の個数: 48

約数和(自身を含む): 33088500

約数和(自身を除く): 20448460

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 6449, 12898, 25796, 32245, 45143, 51592, 64490, 90286, 128980, 180572, 225715, 257960, 316001, 361144, 451430, 632002, 902860, 1264004, 1580005, 1805720, 2528008, 3160010, 6320020, 12640040]

約数ペア:

[(1, 12640040), (2, 6320020), (4, 3160010), (5, 2528008), (7, 1805720), (8, 1580005), (10, 1264004), (14, 902860), (20, 632002), (28, 451430), (35, 361144), (40, 316001), (49, 257960), (56, 225715), (70, 180572), (98, 128980), (140, 90286), (196, 64490), (245, 51592), (280, 45143), (392, 32245), (490, 25796), (980, 12898), (1960, 6449)]