21219320

素因数分解:

$2^3\times 5^1\times {\mathrm{619}}^1\times {\mathrm{857}}^1$

素因数の和:1487

約数の個数: 32

約数和(自身を含む): 47876400

約数和(自身を除く): 26657080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 619, 857, 1238, 1714, 2476, 3095, 3428, 4285, 4952, 6190, 6856, 8570, 12380, 17140, 24760, 34280, 530483, 1060966, 2121932, 2652415, 4243864, 5304830, 10609660, 21219320]

約数ペア:

[(1, 21219320), (2, 10609660), (4, 5304830), (5, 4243864), (8, 2652415), (10, 2121932), (20, 1060966), (40, 530483), (619, 34280), (857, 24760), (1238, 17140), (1714, 12380), (2476, 8570), (3095, 6856), (3428, 6190), (4285, 4952)]