21005328

素因数分解:

$2^4\times 3^1\times {\mathrm{43}}^1\times {\mathrm{10177}}^1$

素因数の和:10231

約数の個数: 40

約数和(自身を含む): 55531168

約数和(自身を除く): 34525840

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 43, 48, 86, 129, 172, 258, 344, 516, 688, 1032, 2064, 10177, 20354, 30531, 40708, 61062, 81416, 122124, 162832, 244248, 437611, 488496, 875222, 1312833, 1750444, 2625666, 3500888, 5251332, 7001776, 10502664, 21005328]

約数ペア:

[(1, 21005328), (2, 10502664), (3, 7001776), (4, 5251332), (6, 3500888), (8, 2625666), (12, 1750444), (16, 1312833), (24, 875222), (43, 488496), (48, 437611), (86, 244248), (129, 162832), (172, 122124), (258, 81416), (344, 61062), (516, 40708), (688, 30531), (1032, 20354), (2064, 10177)]