28280920

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1103}}^1$

素因数の和:1755

約数の個数: 32

約数和(自身を含む): 63789120

約数和(自身を除く): 35508200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 1103, 1282, 2206, 2564, 3205, 4412, 5128, 5515, 6410, 8824, 11030, 12820, 22060, 25640, 44120, 707023, 1414046, 2828092, 3535115, 5656184, 7070230, 14140460, 28280920]

約数ペア:

[(1, 28280920), (2, 14140460), (4, 7070230), (5, 5656184), (8, 3535115), (10, 2828092), (20, 1414046), (40, 707023), (641, 44120), (1103, 25640), (1282, 22060), (2206, 12820), (2564, 11030), (3205, 8824), (4412, 6410), (5128, 5515)]