28401380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{397}}^1$

素因数の和:493

約数の個数: 72

約数和(自身を含む): 70508088

約数和(自身を除く): 42106708

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 73, 98, 140, 146, 196, 245, 292, 365, 397, 490, 511, 730, 794, 980, 1022, 1460, 1588, 1985, 2044, 2555, 2779, 3577, 3970, 5110, 5558, 7154, 7940, 10220, 11116, 13895, 14308, 17885, 19453, 27790, 28981, 35770, 38906, 55580, 57962, 71540, 77812, 97265, 115924, 144905, 194530, 202867, 289810, 389060, 405734, 579620, 811468, 1014335, 1420069, 2028670, 2840138, 4057340, 5680276, 7100345, 14200690, 28401380]

約数ペア:

[(1, 28401380), (2, 14200690), (4, 7100345), (5, 5680276), (7, 4057340), (10, 2840138), (14, 2028670), (20, 1420069), (28, 1014335), (35, 811468), (49, 579620), (70, 405734), (73, 389060), (98, 289810), (140, 202867), (146, 194530), (196, 144905), (245, 115924), (292, 97265), (365, 77812), (397, 71540), (490, 57962), (511, 55580), (730, 38906), (794, 35770), (980, 28981), (1022, 27790), (1460, 19453), (1588, 17885), (1985, 14308), (2044, 13895), (2555, 11116), (2779, 10220), (3577, 7940), (3970, 7154), (5110, 5558)]