20723912

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{79}}^1\times {\mathrm{271}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 43411200

約数和(自身を除く): 22687288

約数列:

[1, 2, 4, 8, 11, 22, 44, 79, 88, 121, 158, 242, 271, 316, 484, 542, 632, 869, 968, 1084, 1738, 2168, 2981, 3476, 5962, 6952, 9559, 11924, 19118, 21409, 23848, 32791, 38236, 42818, 65582, 76472, 85636, 131164, 171272, 235499, 262328, 470998, 941996, 1883992, 2590489, 5180978, 10361956, 20723912]

約数ペア:

[(1, 20723912), (2, 10361956), (4, 5180978), (8, 2590489), (11, 1883992), (22, 941996), (44, 470998), (79, 262328), (88, 235499), (121, 171272), (158, 131164), (242, 85636), (271, 76472), (316, 65582), (484, 42818), (542, 38236), (632, 32791), (869, 23848), (968, 21409), (1084, 19118), (1738, 11924), (2168, 9559), (2981, 6952), (3476, 5962)]