81563420

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{42043}}^1$

素因数の和:42149

約数の個数: 24

約数和(自身を含む): 173053104

約数和(自身を除く): 91489684

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 42043, 84086, 168172, 210215, 420430, 840860, 4078171, 8156342, 16312684, 20390855, 40781710, 81563420]

約数ペア:

[(1, 81563420), (2, 40781710), (4, 20390855), (5, 16312684), (10, 8156342), (20, 4078171), (97, 840860), (194, 420430), (388, 210215), (485, 168172), (970, 84086), (1940, 42043)]