18722120

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7673}}^1$

素因数の和:7745

約数の個数: 32

約数和(自身を含む): 42820920

約数和(自身を除く): 24098800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7673, 15346, 30692, 38365, 61384, 76730, 153460, 306920, 468053, 936106, 1872212, 2340265, 3744424, 4680530, 9361060, 18722120]

約数ペア:

[(1, 18722120), (2, 9361060), (4, 4680530), (5, 3744424), (8, 2340265), (10, 1872212), (20, 936106), (40, 468053), (61, 306920), (122, 153460), (244, 76730), (305, 61384), (488, 38365), (610, 30692), (1220, 15346), (2440, 7673)]