21580785

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{719}}^1$

素因数の和:782

約数の個数: 48

約数和(自身を含む): 40435200

約数和(自身を除く): 18854415

約数列:

[1, 3, 5, 9, 15, 23, 29, 45, 69, 87, 115, 145, 207, 261, 345, 435, 667, 719, 1035, 1305, 2001, 2157, 3335, 3595, 6003, 6471, 10005, 10785, 16537, 20851, 30015, 32355, 49611, 62553, 82685, 104255, 148833, 187659, 248055, 312765, 479573, 744165, 938295, 1438719, 2397865, 4316157, 7193595, 21580785]

約数ペア:

[(1, 21580785), (3, 7193595), (5, 4316157), (9, 2397865), (15, 1438719), (23, 938295), (29, 744165), (45, 479573), (69, 312765), (87, 248055), (115, 187659), (145, 148833), (207, 104255), (261, 82685), (345, 62553), (435, 49611), (667, 32355), (719, 30015), (1035, 20851), (1305, 16537), (2001, 10785), (2157, 10005), (3335, 6471), (3595, 6003)]