19654760

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5521}}^1$

素因数の和:5621

約数の個数: 32

約数和(自身を含む): 44728200

約数和(自身を除く): 25073440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5521, 11042, 22084, 27605, 44168, 55210, 110420, 220840, 491369, 982738, 1965476, 2456845, 3930952, 4913690, 9827380, 19654760]

約数ペア:

[(1, 19654760), (2, 9827380), (4, 4913690), (5, 3930952), (8, 2456845), (10, 1965476), (20, 982738), (40, 491369), (89, 220840), (178, 110420), (356, 55210), (445, 44168), (712, 27605), (890, 22084), (1780, 11042), (3560, 5521)]