1621256240

素因数分解:

$2^4\times 5^1\times {\mathrm{20265703}}^1$

素因数の和:20265716

約数の個数: 20

約数和(自身を含む): 3769420944

約数和(自身を除く): 2148164704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 20265703, 40531406, 81062812, 101328515, 162125624, 202657030, 324251248, 405314060, 810628120, 1621256240]

約数ペア:

[(1, 1621256240), (2, 810628120), (4, 405314060), (5, 324251248), (8, 202657030), (10, 162125624), (16, 101328515), (20, 81062812), (40, 40531406), (80, 20265703)]