21147568

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{347}}^1$

素因数の和:661

約数の個数: 40

約数和(自身を含む): 44403408

約数和(自身を除く): 23255840

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 293, 347, 586, 694, 1172, 1388, 2344, 2776, 3809, 4511, 4688, 5552, 7618, 9022, 15236, 18044, 30472, 36088, 60944, 72176, 101671, 203342, 406684, 813368, 1321723, 1626736, 2643446, 5286892, 10573784, 21147568]

約数ペア:

[(1, 21147568), (2, 10573784), (4, 5286892), (8, 2643446), (13, 1626736), (16, 1321723), (26, 813368), (52, 406684), (104, 203342), (208, 101671), (293, 72176), (347, 60944), (586, 36088), (694, 30472), (1172, 18044), (1388, 15236), (2344, 9022), (2776, 7618), (3809, 5552), (4511, 4688)]