21396840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{178307}}^1$

素因数の和:178321

約数の個数: 32

約数和(自身を含む): 64190880

約数和(自身を除く): 42794040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 178307, 356614, 534921, 713228, 891535, 1069842, 1426456, 1783070, 2139684, 2674605, 3566140, 4279368, 5349210, 7132280, 10698420, 21396840]

約数ペア:

[(1, 21396840), (2, 10698420), (3, 7132280), (4, 5349210), (5, 4279368), (6, 3566140), (8, 2674605), (10, 2139684), (12, 1783070), (15, 1426456), (20, 1069842), (24, 891535), (30, 713228), (40, 534921), (60, 356614), (120, 178307)]