21312872

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{12277}}^1$

素因数の和:12321

約数の個数: 32

約数和(自身を含む): 47147520

約数和(自身を除く): 25834648

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 56, 62, 124, 217, 248, 434, 868, 1736, 12277, 24554, 49108, 85939, 98216, 171878, 343756, 380587, 687512, 761174, 1522348, 2664109, 3044696, 5328218, 10656436, 21312872]

約数ペア:

[(1, 21312872), (2, 10656436), (4, 5328218), (7, 3044696), (8, 2664109), (14, 1522348), (28, 761174), (31, 687512), (56, 380587), (62, 343756), (124, 171878), (217, 98216), (248, 85939), (434, 49108), (868, 24554), (1736, 12277)]