19999304

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{1867}}^1$

素因数の和:1989

約数の個数: 32

約数和(自身を含む): 40797120

約数和(自身を除く): 20797816

約数列:

[1, 2, 4, 8, 13, 26, 52, 103, 104, 206, 412, 824, 1339, 1867, 2678, 3734, 5356, 7468, 10712, 14936, 24271, 48542, 97084, 192301, 194168, 384602, 769204, 1538408, 2499913, 4999826, 9999652, 19999304]

約数ペア:

[(1, 19999304), (2, 9999652), (4, 4999826), (8, 2499913), (13, 1538408), (26, 769204), (52, 384602), (103, 194168), (104, 192301), (206, 97084), (412, 48542), (824, 24271), (1339, 14936), (1867, 10712), (2678, 7468), (3734, 5356)]