19781450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{2341}}^1$

素因数の和:2379

約数の個数: 36

約数和(自身を含む): 39858498

約数和(自身を除く): 20077048

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 169, 325, 338, 650, 845, 1690, 2341, 4225, 4682, 8450, 11705, 23410, 30433, 58525, 60866, 117050, 152165, 304330, 395629, 760825, 791258, 1521650, 1978145, 3956290, 9890725, 19781450]

約数ペア:

[(1, 19781450), (2, 9890725), (5, 3956290), (10, 1978145), (13, 1521650), (25, 791258), (26, 760825), (50, 395629), (65, 304330), (130, 152165), (169, 117050), (325, 60866), (338, 58525), (650, 30433), (845, 23410), (1690, 11705), (2341, 8450), (4225, 4682)]