21690410

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1901}}^1$

素因数の和:2078

約数の個数: 32

約数和(自身を含む): 44917632

約数和(自身を除く): 23227222

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 163, 326, 815, 1141, 1630, 1901, 2282, 3802, 5705, 9505, 11410, 13307, 19010, 26614, 66535, 133070, 309863, 619726, 1549315, 2169041, 3098630, 4338082, 10845205, 21690410]

約数ペア:

[(1, 21690410), (2, 10845205), (5, 4338082), (7, 3098630), (10, 2169041), (14, 1549315), (35, 619726), (70, 309863), (163, 133070), (326, 66535), (815, 26614), (1141, 19010), (1630, 13307), (1901, 11410), (2282, 9505), (3802, 5705)]