21186740

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1\times {\mathrm{163}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 45901632

約数和(自身を除く): 24714892

約数列:

[1, 2, 4, 5, 10, 20, 67, 97, 134, 163, 194, 268, 326, 335, 388, 485, 652, 670, 815, 970, 1340, 1630, 1940, 3260, 6499, 10921, 12998, 15811, 21842, 25996, 31622, 32495, 43684, 54605, 63244, 64990, 79055, 109210, 129980, 158110, 218420, 316220, 1059337, 2118674, 4237348, 5296685, 10593370, 21186740]

約数ペア:

[(1, 21186740), (2, 10593370), (4, 5296685), (5, 4237348), (10, 2118674), (20, 1059337), (67, 316220), (97, 218420), (134, 158110), (163, 129980), (194, 109210), (268, 79055), (326, 64990), (335, 63244), (388, 54605), (485, 43684), (652, 32495), (670, 31622), (815, 25996), (970, 21842), (1340, 15811), (1630, 12998), (1940, 10921), (3260, 6499)]