21372980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{479}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 47416320

約数和(自身を除く): 26043340

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 97, 115, 194, 230, 388, 460, 479, 485, 958, 970, 1916, 1940, 2231, 2395, 4462, 4790, 8924, 9580, 11017, 11155, 22034, 22310, 44068, 44620, 46463, 55085, 92926, 110170, 185852, 220340, 232315, 464630, 929260, 1068649, 2137298, 4274596, 5343245, 10686490, 21372980]

約数ペア:

[(1, 21372980), (2, 10686490), (4, 5343245), (5, 4274596), (10, 2137298), (20, 1068649), (23, 929260), (46, 464630), (92, 232315), (97, 220340), (115, 185852), (194, 110170), (230, 92926), (388, 55085), (460, 46463), (479, 44620), (485, 44068), (958, 22310), (970, 22034), (1916, 11155), (1940, 11017), (2231, 9580), (2395, 8924), (4462, 4790)]