20995780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{3511}}^1$

素因数の和:3556

約数の個数: 48

約数和(自身を含む): 49561344

約数和(自身を除く): 28565564

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 52, 65, 92, 115, 130, 230, 260, 299, 460, 598, 1196, 1495, 2990, 3511, 5980, 7022, 14044, 17555, 35110, 45643, 70220, 80753, 91286, 161506, 182572, 228215, 323012, 403765, 456430, 807530, 912860, 1049789, 1615060, 2099578, 4199156, 5248945, 10497890, 20995780]

約数ペア:

[(1, 20995780), (2, 10497890), (4, 5248945), (5, 4199156), (10, 2099578), (13, 1615060), (20, 1049789), (23, 912860), (26, 807530), (46, 456430), (52, 403765), (65, 323012), (92, 228215), (115, 182572), (130, 161506), (230, 91286), (260, 80753), (299, 70220), (460, 45643), (598, 35110), (1196, 17555), (1495, 14044), (2990, 7022), (3511, 5980)]