21324920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13003}}^1$

素因数の和:13055

約数の個数: 32

約数和(自身を含む): 49155120

約数和(自身を除く): 27830200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13003, 26006, 52012, 65015, 104024, 130030, 260060, 520120, 533123, 1066246, 2132492, 2665615, 4264984, 5331230, 10662460, 21324920]

約数ペア:

[(1, 21324920), (2, 10662460), (4, 5331230), (5, 4264984), (8, 2665615), (10, 2132492), (20, 1066246), (40, 533123), (41, 520120), (82, 260060), (164, 130030), (205, 104024), (328, 65015), (410, 52012), (820, 26006), (1640, 13003)]