21571472

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{757}}^1$

素因数の和:915

約数の個数: 40

約数和(自身を含む): 45398136

約数和(自身を除く): 23826664

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 137, 208, 274, 548, 757, 1096, 1514, 1781, 2192, 3028, 3562, 6056, 7124, 9841, 12112, 14248, 19682, 28496, 39364, 78728, 103709, 157456, 207418, 414836, 829672, 1348217, 1659344, 2696434, 5392868, 10785736, 21571472]

約数ペア:

[(1, 21571472), (2, 10785736), (4, 5392868), (8, 2696434), (13, 1659344), (16, 1348217), (26, 829672), (52, 414836), (104, 207418), (137, 157456), (208, 103709), (274, 78728), (548, 39364), (757, 28496), (1096, 19682), (1514, 14248), (1781, 12112), (2192, 9841), (3028, 7124), (3562, 6056)]