42721420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{1549}}^1$

素因数の和:1762

約数の個数: 48

約数和(自身を含む): 103118400

約数和(自身を除く): 60396980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 788, 985, 1379, 1549, 1970, 2758, 3098, 3940, 5516, 6196, 6895, 7745, 10843, 13790, 15490, 21686, 27580, 30980, 43372, 54215, 108430, 216860, 305153, 610306, 1220612, 1525765, 2136071, 3051530, 4272142, 6103060, 8544284, 10680355, 21360710, 42721420]

約数ペア:

[(1, 42721420), (2, 21360710), (4, 10680355), (5, 8544284), (7, 6103060), (10, 4272142), (14, 3051530), (20, 2136071), (28, 1525765), (35, 1220612), (70, 610306), (140, 305153), (197, 216860), (394, 108430), (788, 54215), (985, 43372), (1379, 30980), (1549, 27580), (1970, 21686), (2758, 15490), (3098, 13790), (3940, 10843), (5516, 7745), (6196, 6895)]