12816920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{4513}}^1$

素因数の和:4595

約数の個数: 32

約数和(自身を含む): 29250720

約数和(自身を除く): 16433800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 4513, 9026, 18052, 22565, 36104, 45130, 90260, 180520, 320423, 640846, 1281692, 1602115, 2563384, 3204230, 6408460, 12816920]

約数ペア:

[(1, 12816920), (2, 6408460), (4, 3204230), (5, 2563384), (8, 1602115), (10, 1281692), (20, 640846), (40, 320423), (71, 180520), (142, 90260), (284, 45130), (355, 36104), (568, 22565), (710, 18052), (1420, 9026), (2840, 4513)]