21053812

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{6043}}^1$

素因数の和:6127

約数の個数: 24

約数和(自身を含む): 40277216

約数和(自身を除く): 19223404

約数列:

[1, 2, 4, 13, 26, 52, 67, 134, 268, 871, 1742, 3484, 6043, 12086, 24172, 78559, 157118, 314236, 404881, 809762, 1619524, 5263453, 10526906, 21053812]

約数ペア:

[(1, 21053812), (2, 10526906), (4, 5263453), (13, 1619524), (26, 809762), (52, 404881), (67, 314236), (134, 157118), (268, 78559), (871, 24172), (1742, 12086), (3484, 6043)]