19861720

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{5119}}^1$

素因数の和:5227

約数の個数: 32

約数和(自身を含む): 45158400

約数和(自身を除く): 25296680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 5119, 10238, 20476, 25595, 40952, 51190, 102380, 204760, 496543, 993086, 1986172, 2482715, 3972344, 4965430, 9930860, 19861720]

約数ペア:

[(1, 19861720), (2, 9930860), (4, 4965430), (5, 3972344), (8, 2482715), (10, 1986172), (20, 993086), (40, 496543), (97, 204760), (194, 102380), (388, 51190), (485, 40952), (776, 25595), (970, 20476), (1940, 10238), (3880, 5119)]