21045180

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{26981}}^1$

素因数の和:27006

約数の個数: 48

約数和(自身を含む): 63461664

約数和(自身を除く): 42416484

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 26981, 53962, 80943, 107924, 134905, 161886, 269810, 323772, 350753, 404715, 539620, 701506, 809430, 1052259, 1403012, 1618860, 1753765, 2104518, 3507530, 4209036, 5261295, 7015060, 10522590, 21045180]

約数ペア:

[(1, 21045180), (2, 10522590), (3, 7015060), (4, 5261295), (5, 4209036), (6, 3507530), (10, 2104518), (12, 1753765), (13, 1618860), (15, 1403012), (20, 1052259), (26, 809430), (30, 701506), (39, 539620), (52, 404715), (60, 350753), (65, 323772), (78, 269810), (130, 161886), (156, 134905), (195, 107924), (260, 80943), (390, 53962), (780, 26981)]