21198890

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1$

素因数の和:398

約数の個数: 32

約数和(自身を含む): 39070080

約数和(自身を除く): 17871190

約数列:

[1, 2, 5, 10, 101, 139, 151, 202, 278, 302, 505, 695, 755, 1010, 1390, 1510, 14039, 15251, 20989, 28078, 30502, 41978, 70195, 76255, 104945, 140390, 152510, 209890, 2119889, 4239778, 10599445, 21198890]

約数ペア:

[(1, 21198890), (2, 10599445), (5, 4239778), (10, 2119889), (101, 209890), (139, 152510), (151, 140390), (202, 104945), (278, 76255), (302, 70195), (505, 41978), (695, 30502), (755, 28078), (1010, 20989), (1390, 15251), (1510, 14039)]