21229420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{353}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 46626048

約数和(自身を除く): 25396628

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 97, 124, 155, 194, 310, 353, 388, 485, 620, 706, 970, 1412, 1765, 1940, 3007, 3530, 6014, 7060, 10943, 12028, 15035, 21886, 30070, 34241, 43772, 54715, 60140, 68482, 109430, 136964, 171205, 218860, 342410, 684820, 1061471, 2122942, 4245884, 5307355, 10614710, 21229420]

約数ペア:

[(1, 21229420), (2, 10614710), (4, 5307355), (5, 4245884), (10, 2122942), (20, 1061471), (31, 684820), (62, 342410), (97, 218860), (124, 171205), (155, 136964), (194, 109430), (310, 68482), (353, 60140), (388, 54715), (485, 43772), (620, 34241), (706, 30070), (970, 21886), (1412, 15035), (1765, 12028), (1940, 10943), (3007, 7060), (3530, 6014)]