19802120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{337}}^1$

素因数の和:474

約数の個数: 64

約数和(自身を含む): 48550320

約数和(自身を除く): 28748200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 113, 130, 226, 260, 337, 452, 520, 565, 674, 904, 1130, 1348, 1469, 1685, 2260, 2696, 2938, 3370, 4381, 4520, 5876, 6740, 7345, 8762, 11752, 13480, 14690, 17524, 21905, 29380, 35048, 38081, 43810, 58760, 76162, 87620, 152324, 175240, 190405, 304648, 380810, 495053, 761620, 990106, 1523240, 1980212, 2475265, 3960424, 4950530, 9901060, 19802120]

約数ペア:

[(1, 19802120), (2, 9901060), (4, 4950530), (5, 3960424), (8, 2475265), (10, 1980212), (13, 1523240), (20, 990106), (26, 761620), (40, 495053), (52, 380810), (65, 304648), (104, 190405), (113, 175240), (130, 152324), (226, 87620), (260, 76162), (337, 58760), (452, 43810), (520, 38081), (565, 35048), (674, 29380), (904, 21905), (1130, 17524), (1348, 14690), (1469, 13480), (1685, 11752), (2260, 8762), (2696, 7345), (2938, 6740), (3370, 5876), (4381, 4520)]