20139860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1091}}^1$

素因数の和:1184

約数の個数: 48

約数和(自身を含む): 46230912

約数和(自身を除く): 26091052

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1091, 1420, 1846, 2182, 3692, 4364, 4615, 5455, 9230, 10910, 14183, 18460, 21820, 28366, 56732, 70915, 77461, 141830, 154922, 283660, 309844, 387305, 774610, 1006993, 1549220, 2013986, 4027972, 5034965, 10069930, 20139860]

約数ペア:

[(1, 20139860), (2, 10069930), (4, 5034965), (5, 4027972), (10, 2013986), (13, 1549220), (20, 1006993), (26, 774610), (52, 387305), (65, 309844), (71, 283660), (130, 154922), (142, 141830), (260, 77461), (284, 70915), (355, 56732), (710, 28366), (923, 21820), (1091, 18460), (1420, 14183), (1846, 10910), (2182, 9230), (3692, 5455), (4364, 4615)]