21083985

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1567}}^1$

素因数の和:1614

約数の個数: 48

約数和(自身を含む): 41094144

約数和(自身を除く): 20010159

約数列:

[1, 3, 5, 9, 13, 15, 23, 39, 45, 65, 69, 115, 117, 195, 207, 299, 345, 585, 897, 1035, 1495, 1567, 2691, 4485, 4701, 7835, 13455, 14103, 20371, 23505, 36041, 61113, 70515, 101855, 108123, 180205, 183339, 305565, 324369, 468533, 540615, 916695, 1405599, 1621845, 2342665, 4216797, 7027995, 21083985]

約数ペア:

[(1, 21083985), (3, 7027995), (5, 4216797), (9, 2342665), (13, 1621845), (15, 1405599), (23, 916695), (39, 540615), (45, 468533), (65, 324369), (69, 305565), (115, 183339), (117, 180205), (195, 108123), (207, 101855), (299, 70515), (345, 61113), (585, 36041), (897, 23505), (1035, 20371), (1495, 14103), (1567, 13455), (2691, 7835), (4485, 4701)]