21881195

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:160

約数の個数: 48

約数和(自身を含む): 32744448

約数和(自身を除く): 10863253

約数列:

[1, 5, 7, 31, 35, 43, 49, 67, 155, 215, 217, 245, 301, 335, 469, 1085, 1333, 1505, 1519, 2077, 2107, 2345, 2881, 3283, 6665, 7595, 9331, 10385, 10535, 14405, 14539, 16415, 20167, 46655, 65317, 72695, 89311, 100835, 101773, 141169, 326585, 446555, 508865, 625177, 705845, 3125885, 4376239, 21881195]

約数ペア:

[(1, 21881195), (5, 4376239), (7, 3125885), (31, 705845), (35, 625177), (43, 508865), (49, 446555), (67, 326585), (155, 141169), (215, 101773), (217, 100835), (245, 89311), (301, 72695), (335, 65317), (469, 46655), (1085, 20167), (1333, 16415), (1505, 14539), (1519, 14405), (2077, 10535), (2107, 10385), (2345, 9331), (2881, 7595), (3283, 6665)]