21359320

素因数分解:

$2^3\times 5^1\times {\mathrm{523}}^1\times {\mathrm{1021}}^1$

素因数の和:1555

約数の個数: 32

約数和(自身を含む): 48197520

約数和(自身を除く): 26838200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 523, 1021, 1046, 2042, 2092, 2615, 4084, 4184, 5105, 5230, 8168, 10210, 10460, 20420, 20920, 40840, 533983, 1067966, 2135932, 2669915, 4271864, 5339830, 10679660, 21359320]

約数ペア:

[(1, 21359320), (2, 10679660), (4, 5339830), (5, 4271864), (8, 2669915), (10, 2135932), (20, 1067966), (40, 533983), (523, 40840), (1021, 20920), (1046, 20420), (2042, 10460), (2092, 10210), (2615, 8168), (4084, 5230), (4184, 5105)]