399777680

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{46703}}^1$

素因数の和:46823

約数の個数: 40

約数和(自身を含む): 938189952

約数和(自身を除く): 538412272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 4280, 8560, 46703, 93406, 186812, 233515, 373624, 467030, 747248, 934060, 1868120, 3736240, 4997221, 9994442, 19988884, 24986105, 39977768, 49972210, 79955536, 99944420, 199888840, 399777680]

約数ペア:

[(1, 399777680), (2, 199888840), (4, 99944420), (5, 79955536), (8, 49972210), (10, 39977768), (16, 24986105), (20, 19988884), (40, 9994442), (80, 4997221), (107, 3736240), (214, 1868120), (428, 934060), (535, 747248), (856, 467030), (1070, 373624), (1712, 233515), (2140, 186812), (4280, 93406), (8560, 46703)]